Malicious PDF — malware analysis report

Static analysis result for SHA-256 170e889f0f01af19…

MALICIOUS

PDF

96.3 KB Created: 2021-06-30 17:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 73840a6fd110cbc0650b4bf0181dee40 SHA-1: 2e710ef529f2e5c1b3f3e29530f6f2ff74c59806 SHA-256: 170e889f0f01af19c910139e22c985676a4c1fa15a55236ffb06ac039651999e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories, suggesting an attempt to lure users to malicious content or phishing sites. The presence of multiple external URIs and link farms on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1609b84daedba3---wigibidipuvigepipubok.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1609d03cb1c87f---vovuxosiredelafojuvaw.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160711c1365719---88848881707.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/0gr2a55lt7f8bqraitcl9uck6c/lidumiseripatuvaju.pdf
    • http://wsp.pl/userfiles/file/1326883937.pdf
    • https://kisikana.hr/userfiles/file/bojusorojosadedufisopo.pdf
    • http://coalcreekcentenary.com/clients/5/52/52f735e63eff8706e1a2a73a20aef632/File/dudubojoraruvube.pdf
    • http://pr-jam.com/ckfinder/userfiles/files/75285649484.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/m300gs8japfsf8tplaes7u3r70/nowekup.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0dab23bb0---juveloserufipa.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/57db9ad4702d3c63d71bf80543cf5124/51476369939.pdf
    • http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/17604687591.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f311ceddd---legalujitowomaru.pdf
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/bujogebexa.pdf
    • https://nbtele.com/en/cache/fck_files/file/20880166179.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d25f8cde487---75547093845.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ada8f1617c1---13597812640.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b707cc557d0---lijuwazupu.pdf
    • http://rheinmotel.com/userfiles/file/15558586721.pdf
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706ffabdc7b---suzaxidebujutekixusajeve.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/ff308e7dab11e7f41875448a48213b17/66768652563.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3fa42ed9a---tupanobokugofigako.pdf
    • https://burstallconrad.com/editor_files/file/26044012677.pdf
    • http://ingmontagna.com/userfiles/files/dufaneviwafadibetewitow.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/lqir579o28vsjponf6flusj0u2/20025782980.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=grade+12+accounting+manufacturing+notes+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_off00011186.bin
cd620ccbe21bdb754b7411cfc55a672f1eb8b750ee40c84a1aba84d5a4859ff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11186 11228 bytes
font_01_sfnt_off00012bbb.bin
187a527809c822fb59a09968d11297b4378a2605f71dced057aa459990114eb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBB 18612 bytes
font_02_sfnt_off00015b7d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B7D 16792 bytes

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