Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb67c5fc3ce4f2c…

MALICIOUS

PDF

83.0 KB Created: 2021-09-01 11:26:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4baaa34d25fc7785b6e83576f8240874 SHA-1: 15c207448f864b055a58bf34f9b09b5d2e27b3f1 SHA-256: edb67c5fc3ce4f2cad1fa14dd756590eafacafe5147164b3f393337d0626982b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content or phishing sites. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://inwebjor.ru/uplcv?utm_term=what+are+the+three+elements+of+drama PDF link annotation
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cf1c8cffd---48508261449.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/161007ac0ac09c---jabanatusonawi.pdfIn PDF document text
    • http://www.trackls.com/application/ckeditor/ckfinder/userfiles/files/96136203513.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/88198705040.pdfIn PDF document text
    • http://interstyle.org/content/xuploadimages/file/wutugoxovanenusi.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16087180d069ec---vadutiwinewuzizutofegim.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/chmjsd80sfrvcddeubmipbkpvg/rewitokalaromev.pdfIn PDF document text
    • http://garderoba.sk/images/_file/forunibanokoxaji.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1a07eed4b---59787493427.pdfIn PDF document text
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/dewuduxemulofev.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0d5bbc53d---87174336034.pdfIn PDF document text
    • http://abwlondonblvd.com/uploads/files/79355571818.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/redopovatazutigofafomojo.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/00f28bc889f77e627fd7359f1cadd83a/86801029396.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/xudaxovegidinidesusuloji.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/cfe948130c4291ea046f48e4875eed53/11379950939.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/wulivisusurojomijafewoli.pdfIn PDF document text
    • https://pestresolution.pt/site/upload/file/37332409485.pdfIn PDF document text
    • http://bydnjl.com/userfiles/files/nefujawetuwokegomobi.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f3b4bc4a3---xerizi.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/77443867965.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/84304066815.pdfIn PDF document text
    • http://tinhdaurosa.com/Images_upload/files/20576948554.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/nezizosivafereko.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_off0000e19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19C 16920 bytes
SHA-256: d040d8009821cffff66dcba502b8388fa2bdd39b021d288231b002a70887c8a5
font_01_sfnt_off00010cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12507 10520 bytes
SHA-256: 58f098bb2ee5aa8fa11d7b4221852aae70af3fd4478bb4551fd6837e6875b6e6

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