Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d192a1015a0b1b…

MALICIOUS

PDF

80.6 KB Created: 2021-04-03 09:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e414acd14178fba658bf641e779d6709 SHA-1: b7b141ab36e218d76623e8189444e65c10f2c2da SHA-256: f2d192a1015a0b1b77fb7510933dfcfe08e8131dd0fe684c49dd9928136594b8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or redirection attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links designed to manipulate search engine results or direct users to malicious content. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the heuristics strongly suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://seumenha.ru/123?utm_term=music+from+spotify+online PDF link annotation
    • http://gazajujana.mygamesonline.org/54731666262.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459058/normal_5ff356064b86a.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/tolstoy_war_and_peace_synopsis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374980/normal_604e165f9f8ed.pdfIn PDF document text
    • https://wisukemebo.weebly.com/uploads/1/3/5/9/135962546/4107120.pdfIn PDF document text
    • https://zogoporev.weebly.com/uploads/1/3/1/3/131381602/7885026.pdfIn PDF document text
    • http://re-prime.ru/what_is_the_best_tip_to_use_for_frosting_cupcakesecp8g.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/lista_de_verbos_en_ingles_en_pasado_simple_y_presente_continuowlmof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365582/normal_5ff3233a4ef43.pdfIn PDF document text
    • https://tidepobowajaxuk.weebly.com/uploads/1/3/0/8/130814761/d4a5a376c88620.pdfIn PDF document text
    • https://xanavixigusom.weebly.com/uploads/1/3/1/4/131453194/d06b9c85.pdfIn PDF document text
    • https://watilokid.weebly.com/uploads/1/3/1/8/131856522/dopowabuzekul_rumekolu_rozesoxefaze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444370/normal_5fcb392ca1263.pdfIn PDF document text
    • http://xezimev.22web.org/balancing_equations_chemistry_gcse.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7664e657-977f-4bbd-9e1a-7528802c31b0/how_do_i_reset_my_whirlpool_duet_steam_dryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bbf35b8-a96c-4ce9-8785-4b783ee80ef9/mipibusekatum.pdfIn PDF document text
    • http://tafaredos.rf.gd/2331582229.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000feb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB6 5060 bytes
SHA-256: 1a5212628902435a355d27067c8f1f525248deeb19c5724a803edd5276afb503
font_01_sfnt_off00010fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEF 10844 bytes
SHA-256: 97df7fc41c2cd6f03cc524517f18167ae69fb4b5ee927e92126baf1757ca3b2f

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