Malicious PDF — malware analysis report

Static analysis result for SHA-256 558e6285df1e2aaa…

MALICIOUS

PDF

82.0 KB Created: 2021-08-26 08:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3ca182b24e137189cd3edf9e97c03ecb SHA-1: 688071423ec84a015a0822454e75a2cfc36e53d0 SHA-256: 558e6285df1e2aaadc7291dec821e43a0b33270d28672e7a52202947c3a2e367
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous links to external sites, many hosted on compromised CMS platforms, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of a 'download' button lure further supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • 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://allytemp.ru/uplcv?utm_term=pqt+question+bank+with+answers PDF link annotation
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607309813a392---xoduragiruvupiwem.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/daramoz.pdfIn PDF document text
    • https://norservis.info/files/files/34262740671.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/70764603666.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/840c6abb07a76c4842c8c52f45618b7d/godopedatojedarut.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823a4587f8d---9820049538.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/ganeberedogikurorusow.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/xaxelowijodaxu.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/14411563708.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/84903664608.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/zozugoxox.pdfIn PDF document text
    • http://digifast.cz/userfiles/4456889653.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160753d661d04f---55219976356.pdfIn PDF document text
    • http://bettekingproductions.com/clients/874300/File/jidipibutufimebovasi.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcdee0b944---xudumidatugirelisajuzu.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/k35l9tmlfe7tlesh7fh7lv6lp5/98257805954.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/78246000676.pdfIn PDF document text
    • http://sandlnae.com/data/editor/file/jinojoleje.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9051e774f---vazuwuziloxafoziladava.pdfIn PDF document text
    • http://defrokatilai.lt/images/files/rijowixisejuw.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_off0000db7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7A 17360 bytes
SHA-256: 799e1acf22bae01379983e9490b22a397ddbfc702c9e7b76e5a336b88136d710
font_01_sfnt_off00010904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10904 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001211b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211B 10724 bytes
SHA-256: 85683b0dfceb868f723e831a41fa21cdac5c91b0d0f954690622272ef6a52979

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