Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1110519849d9a3d…

MALICIOUS

PDF

84.9 KB Created: 2021-08-04 09:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5e65e2a9ffbe4580f33994d2401cc376 SHA-1: f0a569e0190cf4fdda08fa074c71e8049c81116c SHA-256: c1110519849d9a3d1133c30ba08e2690fe3255d3e40f54c4315edaa7fd66b654
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or callback scam. The document contains numerous links to potentially compromised WordPress sites, suggesting an attempt to host or distribute malicious content. The presence of a 'password-protected archive lure' heuristic indicates the document may instruct users to obtain a password for a separate malicious file, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/dhjgrpik7hta6lgmajvkj4k1o9/ketudaxafodovuzuxuzoken.pdf In PDF document text
    • http://ingpoggi.eu/userfiles/files/29860633533.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/c5ni4fm4vmmcnl3nvjd0s47kg7/80757172263.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/18628280174.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/jokikezuriza.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160778069281b4---tarodimamojo.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/b46b7e9858607a58ae211a688a74aa01/rovakujomeb.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/77598395723.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/motikazagowufefinikutok.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/tokotojupikodamaras.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/sarasutarewi.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/aiimd6vn4rc5ljs213228n7i3b/78433146219.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/pazonabap.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/u84pdtb9du0tkfcqmjn9eh0g2p/kaxetisorize.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/69271780813.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/mumamuviluzodejig.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/guwojujonomovofilujatowos.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/puf1ida27oj5e0io3r8e996h5n/86372646345.pdfIn PDF document text
    • http://yjccnc.com/upload/files/59541374018.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/kabipogovolajupekujalan.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/22617802467.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f74d8dd1e---lororirolopunomof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+remove+activation+lock+iphone+6sPDF 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_off0000e79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB2 11044 bytes
SHA-256: 326182364d93f25a9514ba8bacfd12e20a224bea2047d3b3f95f09ddf92bcb28
font_02_sfnt_off00011934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11934 16968 bytes
SHA-256: 2261bc903cc1eaed78f1b3590cae90cf0172c0f11feb8d1ce8333440e7cbf647

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