Malicious PDF — malware analysis report

Static analysis result for SHA-256 33af668fa04d20e6…

MALICIOUS

PDF

108.7 KB Created: 2021-07-03 01:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1046c0c59c01339e3a930681baedaa43 SHA-1: 2aedcad94c6764dbcbf4510640cba7045b8cf45d SHA-256: 33af668fa04d20e63c9c03482870c7911e5610030a7b61653afa06b6ddee8f8f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to compromised websites, indicating a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports the malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9639

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/bf4a92325576eac35e93d26fb8805ab0/59136502781.pdf In PDF document text
    • http://maslatalaia.com/userfiles/file/58448765097.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/258a44d6b1d1387e26088992682cc099/32478854122.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608de2c83d411---newejon.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/20224373917.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/majafewemeduboxuxexex.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071cb4e74358---20269730288.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/jd1v5f9hgg4gd1pusokiarrcoh/84722236342.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/7qbsr3986kr823bj6he6bnram2/basob.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6bc89ddfc---93003397538.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/lamaxabop.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/d379abd490e2267d7e95e9926b5f6f48/82998728307.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/69844304308.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/1afmgfek23ovo2ogchjf1q9fk3/84173023989.pdfIn PDF document text
    • https://strechybenesov.cz/content/kesosujomegufez.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/56905607413.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/vuwavabazeputixo.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/bosafixalerebopidelizil.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22e691a85e---88036435625.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/f3ddc7104ed86ca4c4cde64b6d4a495f/95476596156.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8bc7439c89---9844851753.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/tufamalukojulozasutija.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c14a0156fe2---2333167804.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160928e622174e---33375263889.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/16096497aabfc2---kevurobutitese.pdfIn PDF document text
    • http://babamoleskine.com/files/file/xigaraputamegakira.pdfIn PDF document text
    • http://nature-revive.org/files/file/24839736543.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88cc7b1ecc---xikof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=ready+or+not+movie+full+movie+freePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F56 10672 bytes
SHA-256: 8f2b20444c98b2b5a2a90beff0bd42a48d454ab6360486680affed2d4a6e9bc4
font_01_sfnt_off000147be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147BE 18536 bytes
SHA-256: 1fb80b7baf50a623aecc97ce976e820d3cd36fb615f365c2d83d1cab6ea6f470
font_02_sfnt_off0001774a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1774A 16068 bytes
SHA-256: 6d636ebcb28a43c11a0b96216d988d0aaa25e428b847d4e039b2a2a6b6e27b6d
font_03_sfnt_off00018c6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1