Malicious PDF — malware analysis report

Static analysis result for SHA-256 e827951329f4e73f…

MALICIOUS

PDF

65.1 KB Created: 2021-02-13 16:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0d982c723e4c29df57dc0c5e0212d954 SHA-1: 25831133f0877f0799e34939d034a330030ea2c9 SHA-256: e827951329f4e73fd8561b5f75eeb673b74ae9bf3ea9178e20fc51cc4e7cb3af
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically pointing to a male enhancement product, likely a lure. The PDF's structure and embedded links suggest it's designed to redirect users to potentially malicious sites for phishing or further payload delivery.

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://jacksth.ru/123?utm_term=erx-pro+male+enhancement PDF link annotation
    • http://hellesypakk.online/gilorafovekebnqhom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451736/normal_602604f7f3d78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481291/normal_5fde5039c8dfe.pdfIn PDF document text
    • http://apelsins.space/harris_jayaraj_telugu_songs_naa_songs_downloada87u0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453142/normal_5ffe7e47ad2df.pdfIn PDF document text
    • https://fifukujujaki.weebly.com/uploads/1/3/2/6/132680890/rekarujumu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452389/normal_60123dace4ee7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448121/normal_5fcdcf047fe2a.pdfIn PDF document text
    • http://mon-cmb.best/tetoxtqiao.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415740/normal_5fe7e132005f3.pdfIn PDF document text
    • http://idealslimitaly.site/what_is_ball_millingrrjx6.pdfIn PDF document text
    • http://littlenat.space/nyc_food_safety_course_answerscrw8x.pdfIn PDF document text
    • https://bigufoxorifef.weebly.com/uploads/1/3/1/8/131871864/wugopovapa-lodipewaviw-kazaresazon-nixunuj.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/tosibavurufpr1wa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380525/normal_5fd09d8217678.pdfIn PDF document text
    • http://mamontov-net.cc/54497555476hp7yt.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_off0000c46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC46A 5052 bytes
SHA-256: b833e3e7757c5aa30832608cfd5f1e60ee86601101d21f728fb04b213e59844e
font_01_sfnt_off0000d576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD576 10316 bytes
SHA-256: b7ef71f268f97f1121d87593d201db602f84576ee00a17186e6979d85e5e0a18

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