Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0d4b9194672e34…

MALICIOUS

PDF

85.4 KB Created: 2021-08-14 00:18:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 76e9e3a7380eb980fe48dc2f5f73d872 SHA-1: 0b1b2d25ce7b8b53d5caf067a8e86a541ffd34c4 SHA-256: 6a0d4b9194672e34c861bc3ff43ddaf3c941a9a303d7eec951172b98072ff473
176 Risk Score

Malware Insights

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

The PDF was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The 'SE_CALLBACK_LURE' heuristic suggests the document is designed to trick the user into calling a phone number, a common tactic in tech support scams or phishing operations. The document also contains numerous links to potentially compromised websites, increasing the risk of further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 http://equipociclistaugeraga.com/ciclistas/userfiles/file/razegogawasobesoxuzefijo.pdf In PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16258143386188.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c592929efeb---lazagurefudup.pdfIn PDF document text
    • http://saeronbio.com/userData/board/file/529472683.pdfIn PDF document text
    • https://merydian.pl/nowymerydian/userfiles/file/59148296334.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f51b5a1029a---42690980878.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b60dc55abe---xasanepusowanepet.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/amn0o7cvk5ak6ajcir2vp75615/mawematizax.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/a14c8f9b05153951fd36e25bdbb16a7c/moregopokirilekizenobin.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e97e8a331aa---linezajodugonatokogar.pdfIn PDF document text
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/ec58cfc2da8792974627505ae320e617/nitolivazedodede.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ddcf355da---80449094435.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/b1d7c9b1fd1e1a4d93f920b2848111ed/27639176714.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/49231375220.pdfIn PDF document text
    • http://rajasthanmetals.com/userfiles/file/votevemubirojage.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/jaribefugizotug.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d2f42d085---35354727391.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/64110711137.pdfIn PDF document text
    • http://yuc-fac.com/uploadfiles/20210705205917.pdfIn PDF document text
    • http://jkohut.pl/file/37561144167.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-8-13/20210813022612779164.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/makibokidineru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=banco+of+america+en+espa%C3%B1ol+numero+de+telefonoPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE614 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE26 17888 bytes
SHA-256: e5ea3854b7c94e43b4393d75c8410107c8d1682529577e934460228a08480dcb
font_02_sfnt_off00012c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1E 11140 bytes
SHA-256: d2bbe40bb083f6cb1be6fafb9e6c49246bb165e70e0de61d2199e4c31c2b0f25

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