Malicious PDF — malware analysis report

Static analysis result for SHA-256 566de6956df72769…

MALICIOUS

PDF

92.4 KB Created: 2021-07-20 14:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6cd41513215328fe8bd10fe62a78d49b SHA-1: fa2f53ee8bb74bb9a0e1d7e270529f0dadb9b38b SHA-256: 566de6956df72769f399c2048f9d34a3299294dae55cdc3a1b537b77b965d41e
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://apluskleaning.com/admin/images/file/nameweriginomum.pdf In PDF document text
    • http://boxshop.mn/userfiles/files/safovaxikijur.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16076929a80c29---xexokipafikunoso.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/8844f090868915893147d0802c0cb300/wexaporiluguw.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077cafe642c4---46795848343.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/6150672750.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160807c465ce32---76011124093.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160e6a7e81fb54---zaxivad.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/a48649aea32feeeb1567bb55e8724163/59535585373.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/6603d658e1ffce56b575f482a5d84625/posewevukop.pdfIn PDF document text
    • http://marketherballize.com/ckfinder/userfiles/files/kumefakufavujov.pdfIn PDF document text
    • http://samtle.net/ckupload/files/93351433124.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/38562711597.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/31bcd25d479d5becbbb776d8654ff393/riwulez.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/38qmpji9k1q1nbnklpnqsdibl4/17435043657.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a34fead4f4e---bupofedop.pdfIn PDF document text
    • https://kopari.hu/files/file/bifojiminoseledujagusup.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98c48723c4---dasudanewegotuvaj.pdfIn PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/zifagudoxajidabiparerid.pdfIn PDF document text
    • http://teranor.com/ckfinder/userfiles/files/93316097800.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/30007af38784ad8509cf201b99c95eee/zejigisalowesoma.pdfIn PDF document text
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/c4380b7d30754eb04eb327c0598aa637/50350255128.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=basic+network+questions+and+answers+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001065f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E71 16884 bytes
SHA-256: 9cdec0ba084004be2aab02bcadc0a9830f1106a6dc759b201d102f3c712adb8a
font_02_sfnt_off00014a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A50 11044 bytes
SHA-256: 9ee00ac0b572d2d994a21459ec9d9ba9183d7c1e6a10094a981bf37c41d051aa

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