Malicious PDF — malware analysis report

Static analysis result for SHA-256 8751e60cca010feb…

MALICIOUS

PDF

68.7 KB Created: 2021-01-10 23:56:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f5ae3f86dc6d421216396472f2a78bb6 SHA-1: e7ef05457ebb40753a9c2e8978f00bc6ffaf561a SHA-256: 8751e60cca010febb62694e04de93a3477c9fccea108014ac5c2a42742618e3d
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO manipulation or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and 'SE_LOLBIN_RUN_COMMAND' suggests potentially malicious command sequences within the document text. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, likely aiming to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://traffine.ru/123?utm_term=elite+dangerous+keyboard+and+mouse+layout PDF link annotation
    • https://zinadilijisud.weebly.com/uploads/1/3/4/6/134619113/8fa5cd40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370543/normal_5fe69cdf6a82f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409602/normal_5f934ec1dc946.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453115/normal_5fd0dc7744081.pdfIn PDF document text
    • https://zavegaligap.weebly.com/uploads/1/3/4/4/134499553/seren_powufagazifuf_nidefax.pdfIn PDF document text
    • https://xisovunegukizak.weebly.com/uploads/1/3/4/8/134868464/doketavili_legarozigolevi_rakep.pdfIn PDF document text
    • https://site-1199955.mozfiles.com/files/1199955/ice_cream_lyrics_blackpink_dirty.pdfIn PDF document text
    • https://site-1178522.mozfiles.com/files/1178522/tovijumakabuxipel.pdfIn PDF document text
    • https://site-1173463.mozfiles.com/files/1173463/the_great_courses_plus_cost.pdfIn PDF document text
    • https://papobujiwirila.weebly.com/uploads/1/3/1/4/131453114/piwodem_tagugi_wavedajitiruvab.pdfIn PDF document text
    • https://lifuregetarip.weebly.com/uploads/1/3/4/3/134384561/9de943955e6b1cb.pdfIn macro / runtime command snippet
    • https://cdn-cms.f-static.net/uploads/4421637/normal_5fb3ec8eb0c2e.pdfIn PDF document text
    • https://papobujiwiriIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/kawaii_unicorn_coloring_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/welutizenop/29447383913.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/pitosijuduvimol.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/android_studio_web_browser_example.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/curley_s_wife_dream_of_mice_and_men.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD2 5408 bytes
SHA-256: c827896743e4bb9e4ac296441974451c22ffa449d90c11b3b7aa8c7f74477f42
font_01_sfnt_off0000e02f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02F 11012 bytes
SHA-256: 8540722b4afc97305a752d86db138e6a7b5cfe93faae70ea8f277ca569030942

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