Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8f0207b2d793f1…

MALICIOUS

PDF

62.6 KB Created: 2021-01-14 23:56:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 88674567270f15a4080afdc3677d44e4 SHA-1: d255d77a68d2380c2402ac5601fc7141ad3bfc10 SHA-256: fe8f0207b2d793f1c1367a29a913102fdfe59aca59d9df68430705c7784e2d0b
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded links to external websites, many of which are hosted on disposable domains, suggesting a link farm or redirection scheme. The presence of external URIs and the overall structure strongly suggest an attempt to direct users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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 https://traffnew.ru/aws?utm_term=chapak+chapak+hd+video+song+free PDF link annotation
    • https://site-1177736.mozfiles.com/files/1177736/gokanenukurupi.pdfIn PDF document text
    • https://site-1175088.mozfiles.com/files/1175088/the_parenting_simulator_paid_apk.pdfIn PDF document text
    • https://site-1175914.mozfiles.com/files/1175914/metal_platform_bed_frame_full.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406216/normal_5feb6a5b34f1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424683/normal_5f98d3fe41cc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455660/normal_5fa50ad6de6d7.pdfIn PDF document text
    • https://cdn.sqhk.co/gomiwopizi/OjijrSA/67572895434.pdfIn PDF document text
    • https://site-1168537.mozfiles.com/files/1168537/prison_break_season_1_episode_1.pdfIn PDF document text
    • https://site-1217043.mozfiles.com/files/1217043/1711053238.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419003/normal_5fcbd4185ab1b.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/bi8jg5y/robot_shark_game_download_apk.pdfIn PDF document text
    • https://site-1196011.mozfiles.com/files/1196011/gujogab.pdfIn PDF document text
    • https://cdn.sqhk.co/fexilejedit/ajhMiiC/tofolalibivinami.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484103/normal_5fce68c9b388d.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/nebaperiwedemunajin.pdfIn PDF document text
    • https://site-1177122.mozfiles.com/files/1177122/fedadadoberuvofexaki.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_off0000b921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB921 5416 bytes
SHA-256: 9ed47cd6a44ff963210f9263ae2a8f655f300c773c4832f77201a74c410bc95c
font_01_sfnt_off0000cb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB89 9876 bytes
SHA-256: 398d52653730af7f009630efe783416d039a593d880675654c3ba613c49e53ce

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