Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2436b27789d330c…

MALICIOUS

PDF

74.0 KB Created: 2021-02-12 00:04:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6b3015f06c17ba6e9d2ce908996663e4 SHA-1: 810c97ba93774002d72363023278643faac24514 SHA-256: e2436b27789d330c40601f3384ab6d92344d35ffa212b37bbdd7b25b8c257222
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or SEO abuse tactic. ClamAV detected the file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of external URIs and the overall structure indicate an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/wix?keyword=parochial+athletic+league+diocese+of+orange PDF link annotation
    • http://mebel-albero.ru/godmode_onsmjmh.pdfIn PDF document text
    • https://wolapegod.weebly.com/uploads/1/3/0/7/130776073/kobefomixepi_bexibam_pabifumap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530846/normal_5fe8de057e962.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/fgchfhf/music_theory_books_barnes_and_noble.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/KCieNhc/ant_killer_terro_amazon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420767/normal_60074f23983d5.pdfIn PDF document text
    • https://cdn.sqhk.co/besuduxikuvo/jrGiggd/tippy_tippy_tip_toes_song.pdfIn PDF document text
    • https://cdn.sqhk.co/miwizawi/hfiakgd/dekemekomuta.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/F0KthhF/5665767205.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486552/normal_5fcc1a8e3ec91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416125/normal_6017163c70e73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494429/normal_6017b7fb0af39.pdfIn PDF document text
    • https://sawamamuwez.weebly.com/uploads/1/3/5/9/135992332/zogumelel_bafase.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvajuvewuj/jhJ9NjP/33616364565.pdfIn PDF document text
    • https://cdn.sqhk.co/moviferu/jUiigcU/nigomunubew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451737/normal_5ff757097a0e7.pdfIn PDF document text
    • https://fumujalepobuxav.weebly.com/uploads/1/3/0/8/130813876/zidotalapekuvepigi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29C 5284 bytes
SHA-256: d951934964acca9850b637aec55f903f4607183db08c56e3cb23131cf5f3d778
font_01_sfnt_off0000f48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48E 11636 bytes
SHA-256: 18d917863fcb64e6d636901e75a8c6313fc02610c9338bca0fafc275ee96e50b

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