Malicious PDF — malware analysis report

Static analysis result for SHA-256 f029e87a2626fed3…

MALICIOUS

PDF

81.1 KB Created: 2021-09-15 20:38:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8e9a574b0ea93cd0759bb12846dc0a94 SHA-1: 14a1104cbdd047a27635d9204562eb1b66e97830 SHA-256: f029e87a2626fed39dd9822a6ef27506e17b849e1810987033aa18db8c9cc6b8
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as containing a link farm and pointing to compromised CMS uploads. The ML classifier and ClamAV also identified it as malicious. The embedded URLs suggest a phishing or malware distribution attempt, likely using the links to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://huntic.ru/uplcv?utm_term=live+net+tv+apk+2020 PDF link annotation
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613de4358f015---nifitipir.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/kuzalefimibijukaf.pdfIn PDF document text
    • https://zlato-stribro-investice.com/upload/files/23826566947.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/wimow.pdfIn PDF document text
    • https://www.khaosanpools.org/ckfinder/userfiles/files/71626192700.pdfIn PDF document text
    • http://dtmaso.com/public_html/Imagens/file/10124142384.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/64367715972.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/5493721130.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/71303485663.pdfIn PDF document text
    • http://terralis.net/catalogue_dynamique/file/13502673546.pdfIn PDF document text
    • https://tanhoaphat.vn/userfiles/file/vivupepasira.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/14253872651.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16135958e033d0---30483023313.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/7c67d64bd45510cc755db1e8d3c0d7f2/tamuzolusuvamux.pdfIn PDF document text
    • http://status.cz/UserFiles/File/nosixoki.pdfIn PDF document text
    • https://bonvoyageindia.in/ckfinder/userfiles/files/wukiremawitipaxevav.pdfIn PDF document text
    • http://gurukripapublicschool.com/userfiles/file/23515594263.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/risaga.pdfIn PDF document text
    • https://mmeasar.com/mmeasarfiles/file/fifiziloburoxonige.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/sexuromagerovu.pdfIn PDF document text
    • https://abyway.lv/images/ck_images/files/30235875958.pdfIn PDF document text
    • http://minhquoc.vn/ckfinder/userfiles/files/97900258953.pdfIn PDF document text
    • http://ccsctda.com/ckfinder/userfiles/files/20210914_004846.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F4 17916 bytes
SHA-256: b6c4ac4afe26ed460636e537ba160d6265b0a54635e509bb1d4af36dda6ad216
font_02_sfnt_off00011ffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFD 10168 bytes
SHA-256: 659c7c6084c9e940a00b2f0a2c7df1764a8834627c42189ea9962a75e7edb2c5