Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df354654c8a7059…

MALICIOUS

PDF

105.3 KB Created: 2021-03-15 16:55:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 4fd1b1a7a21e64a6bd8dc70f003ea4a5 SHA-1: dde3ad494e31d192351886b6b9c1afb3d9ac0ee0 SHA-256: 1df354654c8a7059f908adf41f4bd001cfdef8e40aa1c3f619d94bdae5b02ab4
244 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, and contains numerous embedded links. Several heuristics indicate it functions as a link farm, directing users to external PDFs hosted on disposable domains, with at least one URL identified as a known malicious redirector. The primary purpose appears to be to lure users to malicious or phishing content through a network of linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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.
  • 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/wix?keyword=jesus+christ+ethical+teachings In PDF document text
    • https://vonuvevija.weebly.com/uploads/1/3/1/4/131407152/venaxuzaxid_pabavulob_sireminuja.pdfIn PDF document text
    • http://kujisasu.iblogger.org/vunoxogavono.pdfIn PDF document text
    • https://zojevobe.weebly.com/uploads/1/3/1/1/131163992/8596392.pdfIn PDF document text
    • http://gukopujix.22web.org/35134330566.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gumofiwulova.epizy.com/50063609237.pdfIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_07106f17d3bb425b95191b85dd73add0.pdf?index=trueIn PDF document text
    • http://wulagaw.rf.gd/collformic_matagalls_les_agudes.pdfIn PDF document text
    • http://zuluvegutadetu.epizy.com/banting_postdoctoral_fellowship_application_guide.pdfIn PDF document text
    • http://texatopewewew.epizy.com/rewez.pdfIn PDF document text
    • http://batogejupimole.rf.gd/sobifebesixazuviletaxi.pdfIn PDF document text
    • http://jipokogave.epizy.com/minecraft_map_editor_apk.pdfIn PDF document text
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_ffa248482f7b4bdfb6f35502406911a5.pdf?index=trueIn PDF document text
    • http://pepojugatidi.epizy.com/xupivonoro.pdfIn PDF document text
    • https://a0d2adcf-75bd-42a9-a42a-c23e1c6e9e1a.filesusr.com/ugd/85c99c_58f46ff891024dbfa9510d7619b83957.pdf?index=trueIn PDF document text
    • http://ludoxijijux.rf.gd/assetto_corsa_dtm_2017_mod.pdfIn PDF document text
    • http://vulikoviluxugu.rf.gd/39725136662.pdfIn PDF document text
    • https://1f49b3f1-4b09-4f89-88df-03804352fc9a.filesusr.com/ugd/a51aec_6bdfb8a08267424a97cf2003103abfcf.pdf?index=trueIn 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_off0001627a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1627A 5048 bytes
SHA-256: 04f0c6d1b9becb04dba057b33034aeff6d2f70592f8af26388bc435ceb8c9a59
font_01_sfnt_off000173a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173A0 10736 bytes
SHA-256: f31dde818b339df5207235fbbe70f5e0c5a7588973b88db3b847f2f036d91393

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