Malicious PDF — malware analysis report

Static analysis result for SHA-256 7131f0e120ec2b83…

MALICIOUS

PDF

89.1 KB Created: 2021-09-13 04:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 98aba2c45526c3c6021ab09753c1c2aa SHA-1: ce520bedb24cc3c6669ca3400294caca8f970271 SHA-256: 7131f0e120ec2b836dc904dd324060c38b73b92177b97bfa1111079e208d4bb6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a phishing or scam campaign. It contains numerous external URLs, many of which are hosted on compromised or disposable domains, suggesting an attempt to redirect users to malicious sites. The 'SE_CALLBACK_LURE' heuristic indicates the document may prompt users to call a phone number, a common tactic in tech-support scams or refund fraud lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://queure.ru/uplcv?utm_term=update+your+android+version PDF link annotation
    • http://peak-experience-japan.com/images/blog/file/61764431395.pdfIn PDF document text
    • https://organicearthfiji.com/documents/file/terabutasup.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/vuvazoxatuxazok.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/menerixunugatomali.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/69845431117.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/br3vd1vkqigb39f93beajpsiig/67973878174.pdfIn PDF document text
    • http://thueotodn.com/uploads/image/files/3851513517.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/77327274046.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/6802989545.pdfIn PDF document text
    • https://divanich96.ru/admin/ckfinder/userfiles/files/38534072702.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/98182752189.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/85434233149.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/xasujofofobiver.pdfIn PDF document text
    • http://oticonshop.com/ckfinder/userfiles/files/30592069204.pdfIn PDF document text
    • http://thy-environment.com/userfiles/files/daxuwosewumitufet.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/ruwiwetuxatusuga.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/joxexewimivobatebodotunu.pdfIn PDF document text
    • http://iproperty.ae/userfiles/file/furejevenewowe.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/46467601789.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/viruwo.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021090521145980554.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130e6ac7d09f---nasovitawiw.pdfIn PDF document text
    • http://sozopolihills.com/userfiles/file/78138265534.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613552c8e138b---10199440906.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/balevixoronitogitijew.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/hj6dn3mih1h07e0ipb26436och/rozijesimamazebag.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_off0000f7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB3 17948 bytes
SHA-256: f136547de6574e112f13a8ed9be38f2e32f2a77c7c515912fdcaeeefc4c05f02
font_02_sfnt_off00013e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E11 10628 bytes
SHA-256: a04ed603c9bc91f65fe0a96714496df2c54169d65e0cc41f84738d65a5f7f66a

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