Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8fee033f081fa76…

MALICIOUS

PDF

82.7 KB Created: 2021-08-21 05:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f2bfd8ebe300dc4153cd00e1fa3e66ec SHA-1: 947716e000b94d68ca5ff41317af83991af5a4e4 SHA-256: f8fee033f081fa765ab37c54241191e99aae156e4a5b9aef3b1353399dc24530
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites hosting further PDF files. Heuristics indicate this is a link farm designed to distribute malware, with ClamAV detecting it as a phishing trojan. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c278863f6f---ruwexawexe.pdf In PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/5a8da5efb6d5d87fb79aa522ddd8ba97/sedizunewujikunilefidebu.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/welijoni.pdfIn PDF document text
    • https://atl-50.com/files/file/momewafimemag.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/ddd777d7cd5d340c9a6e70ba626fed3d/85589774623.pdfIn PDF document text
    • https://taxiparga.com/wp-content/plugins/super-forms/uploads/php/files/95ed7d8a56655288dc763a03d9bbee4a/bedebarenivezude.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/fadapomebowazutunej.pdfIn PDF document text
    • https://myvideoclasses.com/ci/userfiles/files/11988673660.pdfIn PDF document text
    • http://smithandfriendsfamilyreunion.com/clients/d/d0/d05d9bb0b75700e7199fc64e52c62161/File/nawujeropovifofadebevof.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/84556064379.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/tesaxesesinemebuxib.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/62724259202.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/99426840593.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/xawinatamuxotolisurifiv.pdfIn PDF document text
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/fiwutuxarajitas.pdfIn PDF document text
    • https://tmtteks.com/files/31548241802.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085069dd627e---5581480343.pdfIn PDF document text
    • http://first-group.kr/ckupload/files/39421248104.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/98b2926c3cdcf9044999c4a963f2e6b7/noxol.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160845d15b1f64---livawefozidovunako.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/582b180734697aa1f88a178e92b5c381/35528070265.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/2g2qrhf2ennims5k7hcf87mdi3/jonoxavines.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606effc0730cf---vitawulavigiwederepaponab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=free+online+pdf+to+jpg+converter+for+large+filesPDF 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_off0000dff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF2 16420 bytes
SHA-256: fb42c3942bfc3a22779b7b13ae9a4973a10315fdc9cb97b5a6903d561737e846
font_01_sfnt_off00010ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E9 10968 bytes
SHA-256: 731803ea5e31f122803328f2dac78b035ea1fb81110756c2a0133a5071a3a26a

Open this report in the interactive analyzer, or submit your own file for analysis.