Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0f1eb29211385d…

MALICIOUS

PDF

80.5 KB Created: 2021-04-01 16:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3b7df214cbb7e4bb72ae2d4176023dd0 SHA-1: ee8a06a3a7b7e9f4fecf4af13e13e5167424741b SHA-256: dd0f1eb29211385d11150f199282e278ea226c38d346db13ec45fc6b703ff16f
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or are part of a link farm designed to manipulate search engine results. One critical heuristic indicates a direct link to known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and link farm heuristics suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=an+anthropologist+on+mars+pdf+free In PDF document text
    • https://static.s123-cdn-static.com/uploads/4369506/normal_600633c228bae.pdfIn PDF document text
    • https://cdn.sqhk.co/wanazofemuvu/ILpiiqv/82009933022.pdfIn PDF document text
    • https://cdn.sqhk.co/mazonixun/jjidbii/characters_warriors_orochi_4.pdfIn PDF document text
    • https://rivewatot.weebly.com/uploads/1/3/3/9/133999312/3b2e8baf80d8d9a.pdfIn PDF document text
    • http://dom-bita.org/what_is_the_weight_limit_on_a_delta_bassinet549i1.pdfIn PDF document text
    • https://zorusijumabek.weebly.com/uploads/1/3/4/8/134851431/6081607.pdfIn PDF document text
    • http://ctuxuu.com/jupujaduva2s8o1.pdfIn PDF document text
    • https://cdn.sqhk.co/midijanere/BgdjfaT/primary_and_secondary_sources_worksheet_grade_6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458421/normal_604ff3d9bedf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387232/normal_5fe0443e81cfa.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/ChJqhfz/maxeruzigijuk.pdfIn PDF document text
    • http://sdl-trade.com/soundbot_sb571_speakere76ui.pdfIn PDF document text
    • https://wumigativagulam.weebly.com/uploads/1/3/1/6/131637174/171483d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392857/normal_602091d0c4999.pdfIn PDF document text
    • https://nifilova.weebly.com/uploads/1/3/0/7/130740060/90a704.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/91737677333.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/dewoze.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/zevajinuwemixovasegafazil.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/29892099322.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/golf_buddy_vs4_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/verbos_regulares_e_irregulares_mas_usados_en_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/75229304345.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/turogugarizazu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6A 5444 bytes
SHA-256: fdae19cadd5e8e97bd827e02b5d15fc50826bba650dea423fce4d2f1bbd864b1
font_01_sfnt_off00010dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBF 11744 bytes
SHA-256: 24ca7bac44cc1c84a123fd9ef9beaed2855aebf8c3f4e51027d8dbd6d5aefd58

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