Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec5f89e47d7102f…

MALICIOUS

PDF

84.2 KB Created: 2021-09-07 03:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6e55be92db6305abd3e0b80814e5d632 SHA-1: 2f7d03b1306b2b2aa7c6a598910777d2d2a62aed SHA-256: cec5f89e47d7102fdfb62302a056ee71a573681ab694c7505f750093c233ae39
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites and IP addresses, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160b41fa55b5d7---todovogimavejigutul.pdf PDF link annotation
    • http://insuralead.com/userfiles/file/20720298370.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0544e47c7c---gubizepilalununalobirad.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160aea58a067f6---patebozoboto.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///32484079671.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/laviketezafazitim.pdfIn PDF document text
    • http://gruppocaminiti.it/userfiles/files/75412588751.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/2iu29k40nhv770vtindg7qu5f9/sifipikedasilo.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d33a4d5275---26941206882.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/wovonapuzaj.pdfIn PDF document text
    • http://slovbau.sk/test/userfiles/file/xekavegarojoregogor.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/6619710153.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/2c8cd8dc9134d3bef984a6bd57a63bef/27187358360.pdfIn PDF document text
    • http://isystem.hu/userfiles/file/55320011586.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/darogumikelu.pdfIn PDF document text
    • http://teechart.com/uploads/images/files/57830378727.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1324182b32---xuwokutarogexekidu.pdfIn PDF document text
    • http://crmloccitanecr.com/campannas/file/tetexoxodotuxiwi.pdfIn PDF document text
    • https://korvioinfotech.com/ckfinder/userfiles/files/mabokumisuf.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5bcdbad20e---xixonefopasarasukur.pdfIn PDF document text
    • http://tootingtaxi.com/survey/userfiles/files/zutanofi.pdfIn PDF document text
    • http://ingmarcofaedi.com/userfiles/files/37619624574.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=2015+bmw+x1+xdrive28i+owners+manualPDF 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_off0000e19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19B 18256 bytes
SHA-256: 79bdee8ea805a61412c13f3f00bbb0f967e6f48319abd27a86ba50d7ee54b40c
font_01_sfnt_off000110a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A0 11344 bytes
SHA-256: 3d4af0c676bd9cae226fdbcf17507398d539a4ec60a9cf1b73e9988565f58aa9
font_02_sfnt_off00012b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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