Malicious PDF — malware analysis report

Static analysis result for SHA-256 7015cd2134da5809…

MALICIOUS

PDF

79.2 KB Created: 2021-09-19 06:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3fd192f6276e08746802acd5e8aa125f SHA-1: a4b086f3cdb376e39f30c8c16dd2ab0f4e2dd50b SHA-256: 7015cd2134da5809a1ce2f8139554fd877a5c023817344aa480f0c94116eb595
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to disposable hosting and potentially compromised CMS uploads. The embedded URLs suggest an attempt to redirect users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://clingac.com/d/files/59002242493.pdf In PDF document text
    • http://ankaraeksioglu.com/resimler/files/tevitelinumuxixobufabom.pdfIn PDF document text
    • https://talenthunt.biz/userfiles/file/lunaziw.pdfIn PDF document text
    • http://www.bluefashion.cz/ckfinder/userfiles/files/timotamuwepepape.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/84871816491.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613011f034e58---lavevatamuvepodofe.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/xolaxutokewe.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/35258779772.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/visitakiwuvuf.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/ea85115b84721bbefaa40d9caf7bf249/15058835701.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16133a913d8bb3---23245488142.pdfIn PDF document text
    • https://glaskunstcentrum.nl/images/file/wofojegisonerage.pdfIn PDF document text
    • http://karthikeyanjayaram.in/userfiles/file/70791727194.pdfIn PDF document text
    • http://immobilieninvestors.org/userfiles/file/56411083496.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/53829702745.pdfIn PDF document text
    • http://yesfabric.com/images/upload/File/rapumexegomonomuzobav.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/xezevarobedeg.pdfIn PDF document text
    • http://inannamsao.com/uploads/files/19741327210.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/rozukakasaturileva.pdfIn PDF document text
    • http://ccshecea.org/upload/files/nikas.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/35085745602.pdfIn PDF document text
    • http://tearose-kitchen.com/sites/default/files/images/imcefile/suxodudagaxelifibiji.pdfIn PDF document text
    • https://akvanova.ru/sites/default/files/6537463655.pdfIn PDF document text
    • https://ww150006.linebot.net/upfile/files/20210912022005.pdfIn PDF document text
    • https://cuatudongnhatrang.com/uploads/files/xuwixizu.pdfIn PDF document text
    • https://olterus.org/contents/files/bometusidew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=apk+fallout+shelter+onlinePDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5B 18716 bytes
SHA-256: 9650cbeff7881d36a72a4c742347fd2dd65781ee2f6e9391d2a4a9326b6c0dff
font_01_sfnt_off0000fe69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE69 10628 bytes
SHA-256: 3a6d8ae59a72438ad2083f53fe8c82808359beea9c401e1f723fc5151e85252c
font_02_sfnt_off000116bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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