Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44976a91ae0d227…

MALICIOUS

PDF

85.0 KB Created: 2021-07-07 20:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d482f2435519911c67a98dbce26c784a SHA-1: 61da6693e90e206bb523e85af4b1ee4f7a4531bc SHA-256: e44976a91ae0d22743f47e64dcb0bbacc9ad0bcea7c2f9a755b84e36b89f162f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document contains numerous links to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the heuristic 'SE_CALLBACK_LURE' suggest the document is designed to trick users into visiting these sites, potentially for credential harvesting or further malware deployment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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.
  • 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 https://inwebjor.ru/uplcv?utm_term=clinical+policy+and+procedure+manual
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728004c4eb9---52185634376.pdf
    • http://skybuildinfraprojects.com/uploads/bafewutudisawedoterus.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/2a996be76fa304bd4b6b446f049d8422/71345814016.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/500f4ccdea03020f555f87fa96c51add/55973624305.pdf
    • http://fantalife.nl/userfiles/file/49581932048.pdf
    • https://alihuata.com/userfiles/file/83619917003.pdf
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/87e5c98acef18462870da252dcb4a112/90603036244.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/pek2ereot0qj3oue10gq71fdmo/guvorelugulukisunovak.pdf
    • http://envigest.cz/upload/file/zuvil.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609402daafdf0---sulagipuzobotobu.pdf
    • http://uniquestatues.com/clients/9/91/91c6e204ee4529d3b478b0717040545d/File/nukisawixaba.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abcf2f533e3---26912715594.pdf
    • https://betalinktech.com/blmedia/file/zekivabesuvo.pdf
    • http://sistersaviopublicschool.com/userfiles/file/74480683495.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b566ae00a1---nivoti.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6bd1e5985---wozazuvevuferexi.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609659d18810b---sipilexu.pdf
    • https://netshopnepal.com/userfiles/file/zovakof.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/8711821527.pdf
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/c6e2f445818e51aef96f7ec7c22bd359/25120579876.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/0fgm6f2v4etcv4gini0dvg7n49/keruranurid.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a9078018b34---tesobolaror.pdf
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/48756686351.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ae20229353d---74108062612.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160afe44f4d940---xululilavaji.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b90209b82d---43167643176.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea8d.bin
0d4c846ea96f5a4a4b0663663188166960fec0281e6684e02a5ce237c259a1c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8D 16688 bytes
font_01_sfnt_off000115f4.bin
f6bc9c4cc32f1ff76304db8f1ba38da5a3cdc6b4581e01f5ff39c18caf0db5da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115F4 10656 bytes
font_02_sfnt_off00012e4e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4E 16792 bytes

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