Malicious PDF — malware analysis report

Static analysis result for SHA-256 069756c7c4f6bad3…

MALICIOUS

PDF

75.3 KB Created: 2021-03-30 06:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29850c43890bd7420ed851dd1e0d8300 SHA-1: d9c01f79d68a5f004a9a1a065d3df62300a041e9 SHA-256: 069756c7c4f6bad3aa72e991a626c0f95beb2f6b059d09e1486aae6c1d0c80ef
156 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 are SEO-themed and point to other PDF files, indicating a link farm or distribution network. The primary URL suggests a lure to a page related to 'british english words pronunciation pdf'. ClamAV and ML classifiers flagged this as a phishing or malicious PDF. No scripts were extracted, but the structure suggests it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/award?keyword=british+english+words+pronunciation+pdf
    • http://copyrights-notices-helps.com/92166175542q6q55.pdf
    • http://magazinrf.xyz/44978969596n6l57.pdf
    • https://cdn.sqhk.co/fujotojaxob/ijjiO47/polaroid_originals_cameras_and_stranger_things_collection.pdf
    • https://cdn.sqhk.co/faroziwe/jfMUcii/lagirokeso.pdf
    • https://cdn.sqhk.co/dopinaku/iifgdLq/ccse_exam_full_form.pdf
    • https://cdn.sqhk.co/jazumagefo/hiidnhb/examples_of_strong_project_management_skills.pdf
    • https://mabamigetope.weebly.com/uploads/1/3/4/4/134493328/6e97cf.pdf
    • https://cdn.sqhk.co/rapovixovuti/iiRhegG/55169585663.pdf
    • https://topizamo.weebly.com/uploads/1/3/4/4/134435864/3681620.pdf
    • http://complerbnp.com/phase_1_reactions_biotransformationfzqqq.pdf
    • http://dipenoguzel.sportsontheweb.net/42063109866.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wuwedilejom.myartsonline.com/hp_designjet_500_ink_cartridge_problems.pdf
    • https://a001dc82-f31e-4944-9b76-0a8e602b6855.filesusr.com/ugd/e4ee87_efc998d3d3684f4287eaf67b922ed592.pdf?index=true
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_0504d614f3164b399716c3f7d93a1f85.pdf?index=true
    • https://s3.amazonaws.com/xomepixo/airplane_1980_movie_480p.pdf
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_96330e7cb2c84758a091c64c53253574.pdf?index=true
    • https://cdfb6f36-dde2-4af5-b3b7-55ff39976061.filesusr.com/ugd/c6ac46_609067ce9e8c45f58a617a401f584b73.pdf?index=true
    • https://s3.amazonaws.com/welanisowari/14051900646.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dccf.bin
d13ecba16763d36ee6820bf2719dfe8f88d749241b2df0f0b0ca234e61aeb353		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCF 5556 bytes
font_01_sfnt_off0000efc8.bin
eb5cc229711b8817c89e8029752a0c94136f7fc549723c6974a9d9bb22f64c57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC8 15436 bytes

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