Malicious PDF — malware analysis report

Static analysis result for SHA-256 020a8b100624629d…

MALICIOUS

PDF

82.0 KB Created: 2021-09-16 06:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 81369c4f3bf1cea10d25165bc1b2c209 SHA-1: d653a73e64113a3df73e8f51f7297d7d67a1a64f SHA-256: 020a8b100624629d790b7fa96f26894301ae393a8028c1d53770d8a8fc34b64b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common phishing or malware distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://synerhu.ru/uplcv?utm_term=iron+man+2+online+stream PDF link annotation
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613b470ea837a---nazego.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/36362875812.pdfIn PDF document text
    • http://vetsnab32.ru/userfiles/file/95224778038.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/cde8f8db55cf4904be9d3032e51dfa1f/vopevexigixomumer.pdfIn PDF document text
    • http://topup-fight.com/ckfinder/userfiles/files/dilixa.pdfIn PDF document text
    • http://tdsns.ru/userfiles/file/15698096450.pdfIn PDF document text
    • http://iccjsc.vn/images/uploads/files/25600025799.pdfIn PDF document text
    • http://sspvjd.com/FileData/ckfinder/files/20210905_3D3E00F9C3C7864B.pdfIn PDF document text
    • http://bedrucken24.de/userfiles/file/kilupumasanugukikopon.pdfIn PDF document text
    • http://soeurs-scjboran.fr/soeurs/upload/files/5602041911.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/88749824947.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/39469474918.pdfIn PDF document text
    • https://olivermilk.vn/tctt/sites/aaa/file/gejipenodum.pdfIn PDF document text
    • http://lamexmarket.com/uploads/files/26113383977.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/12344057787.pdfIn PDF document text
    • https://tsegypt.com/file/zoxujufewexojipuruw.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/zifonono.pdfIn PDF document text
    • https://zniczekowalczyk.com/user_images/file/kijufejixemujiwek.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/kolebiwokojep.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/30223841415.pdfIn PDF document text
    • http://divorcefinance.nl/uploads/file/63525297033.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd9d199aaf---7864839099.pdfIn PDF document text
    • https://kham.vn/userfiles/file/gofabulokalufeza.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_off0000dbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD2 18116 bytes
SHA-256: 1c54a1b522e0cabd6d4ad76244f609b4cd7527ccaacfb2eb418d9f665765091a
font_01_sfnt_off00010b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B57 10340 bytes
SHA-256: 5019e796ae4141e8e1be8ddc6269a926faf167423adc691cc97cb7847ad7f7a6
font_02_sfnt_off000122b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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