Malicious PDF — malware analysis report

Static analysis result for SHA-256 16dd00af5fefd7d4…

MALICIOUS

PDF

95.9 KB Created: 2021-02-15 12:31:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 85676f8c15c09d63f82d4777c4ab8c13 SHA-1: 3d155dc948a92117d9a425a23af97e9ea5c730b5 SHA-256: 16dd00af5fefd7d4e63525b723cf6f3f167e9544ebde997c808fc158155c379e
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The PDF contains numerous embedded URLs pointing to various domains, suggesting it functions as a link farm or redirection service. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest the document's purpose is to direct users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=rent+angel+song PDF link annotation
    • https://cdn.sqhk.co/sizafutito/bridwhb/29364229785.pdfIn PDF document text
    • https://dokegofixak.weebly.com/uploads/1/3/0/8/130873830/488647.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485935/normal_5ff3a01134337.pdfIn PDF document text
    • http://pafekusiwajida.66ghz.com/dead_space_2_severed.pdfIn PDF document text
    • http://lanejaselisipu.22web.org/kintex_ultrascale_datasheet.pdfIn PDF document text
    • http://mukoxadetovewo.66ghz.com/atomic_absorption_spectroscopy_journal.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/efnhagg/dadolevurabovusopuzapi.pdfIn PDF document text
    • https://nupuwumot.weebly.com/uploads/1/3/5/3/135305030/2062034.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/9893787.pdfIn PDF document text
    • https://muvanuxeb.weebly.com/uploads/1/3/4/0/134096654/xijalupubamusi_vobek.pdfIn PDF document text
    • https://cdn.sqhk.co/gilevetu/gidsIlP/make_salon_price_list_online.pdfIn PDF document text
    • http://selizixid.iblogger.org/sudovubajeju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469126/normal_5ff1dba322f3a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nitovotiroxe.epizy.com/netpatch_firewall_mod_apk.pdfIn PDF document text
    • http://jopavufugas.epizy.com/94821245438.pdfIn PDF document text
    • http://fuvogixerad.epizy.com/mayabazar_old_songs.pdfIn PDF document text
    • http://wewepov.rf.gd/asvab_for_dummies_free.pdfIn PDF document text
    • http://zuvujivir.rf.gd/97361381068.pdfIn PDF document text
    • http://nomapalugaji.epizy.com/buzzer_round_questions_with_answers.pdfIn PDF document text
    • http://kuwixogup.rf.gd/azshara_guide_tank.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12755 5064 bytes
SHA-256: 9edbedfb318d326d02b885f604a2f3b17b6fb14d906e961c46308341e75ac2ea
font_01_sfnt_off000138de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138DE 4764 bytes
SHA-256: 00a99f58eefdd1d469eb14fc945516fad537dc781e3bcc9f0c2be44f1e9a32e8
font_02_sfnt_off0001492b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1492B 12760 bytes
SHA-256: fc44faa33991d2ef0f854e4a192d7754ae1296a63c2755cfbaa183913682a1e1

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