Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4032cc22b0aafa…

MALICIOUS

PDF

83.5 KB Created: 2021-09-16 10:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 38007e5c33d63da33d5ab267ff3f3b41 SHA-1: fe9d60e43b3a284235f8ec5ad529965d04fe94cc SHA-256: fd4032cc22b0aafae3b81fa401d2b8cc66073446517758b8e6f58146b7092c76
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF viewers and redirecting users to malicious sites. The presence of numerous external URIs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution campaign. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=android+app+development+framework PDF link annotation
    • http://liily.jp/upload/file/20210906021102.pdfIn PDF document text
    • https://westhygiene.hu/editor_up/96895131815.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/llsvsl408e192gct1q168d4qb5/54593023545.pdfIn PDF document text
    • http://haki.vn/uploads/files/16788109078.pdfIn PDF document text
    • http://vako.vn/app/webroot/uploads/files/81382302892.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/85097540756.pdfIn PDF document text
    • http://friend5190.xyz/js/ckfinder/userfiles/files/71697458276.pdfIn PDF document text
    • http://tuning-zone.eu/userfiles/file/42324394732.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/lugojisamojaxikow.pdfIn PDF document text
    • https://festacontinua.it/public/file/tarako.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/jepenitekuforumib.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/76116230719.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/21047508094.pdfIn PDF document text
    • http://www.gitialiganjlko.org/ckfinder/userfiles/files/9260863918.pdfIn PDF document text
    • http://hingliltd.com/userfiles/87372164320.pdfIn PDF document text
    • http://hcbarrett.com/user_area/file/dotinepofanosekaguxopo.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/topazeliw.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16131764b27533---gesijuxekejig.pdfIn PDF document text
    • https://asi-filter.pl/files/file/sopovirivubama.pdfIn PDF document text
    • http://pmrs.ps/userfiles/file/fowuw.pdfIn PDF document text
    • http://thomasgearon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sagaduzokanawexu.pdfIn PDF document text
    • https://invision.buzyhub.com/files/zidiwoxukigomuvuxokoma.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/jituxosum.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_off0000e2e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E5 17360 bytes
SHA-256: fd2d0a79e5dec4c4b35c2b84c6343439ce43231d541eac15f3568995548806bc
font_01_sfnt_off00010fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD0 10716 bytes
SHA-256: 68ad969a1fec0baf177adba176b315a776571f7e48b2f137864fe8748afd0c33
font_02_sfnt_off00012874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12874 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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