Malicious PDF — malware analysis report

Static analysis result for SHA-256 c040c268269cb08f…

MALICIOUS

PDF

79.0 KB Created: 2021-03-21 21:39:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3a6face508508b1b6ece18e1983ea500 SHA-1: cca26bba24fd06b4e2f2cc24d87ff8d997d172d4 SHA-256: c040c268269cb08fa8ca4dcf7a9bb5217f3fe32489da26b1b408f0b5f7a5c500
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to link farms and potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM and PDF_URI heuristics. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the presence of many external links suggests an attempt to redirect the user to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://xezojetit.ru/award?keyword=the+fourth+trimester+book+pdf PDF link annotation
    • https://redulexaxoxega.weebly.com/uploads/1/3/0/8/130874010/duduleduj.pdfIn PDF document text
    • https://tusosalowikos.weebly.com/uploads/1/3/1/4/131453146/nisifivomagukato.pdfIn PDF document text
    • http://idealslimitaly.site/887912522194fmln.pdfIn PDF document text
    • http://vonoxafaku.scienceontheweb.net/90125551671.pdfIn PDF document text
    • https://datokusowijodo.weebly.com/uploads/1/3/0/7/130776434/nazimajowekodo_rugama_xoguzigakado_kevavulasagun.pdfIn PDF document text
    • https://dogaralezuj.weebly.com/uploads/1/3/1/6/131637140/lelelabamuwutejixij.pdfIn PDF document text
    • http://togaxifobuf.mypressonline.com/kellogg_casebook_2020.pdfIn PDF document text
    • http://whalesqpa.fun/nombres_de_mujeres_de_la_biblia_antiguo_testamento74as2.pdfIn PDF document text
    • http://xufikefizot.sportsontheweb.net/55987252150.pdfIn PDF document text
    • https://vupixesit.weebly.com/uploads/1/3/2/7/132740805/8415434.pdfIn PDF document text
    • http://beremoter.online/xmeye_setup_android0ylh0.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/3fe3853b3470ab.pdfIn PDF document text
    • https://lonokowikur.weebly.com/uploads/1/3/5/3/135384913/denup_jilop.pdfIn PDF document text
    • https://digagewopaloz.weebly.com/uploads/1/3/4/6/134634746/gumedek.pdfIn PDF document text
    • http://aov.one/common_english_verbs_listwel40.pdfIn PDF document text
    • https://puwexisafiza.weebly.com/uploads/1/3/4/5/134586360/8658509.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/lezerawe/16266796965.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/93778947904.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/87268072861.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/java_1._8_for_linux_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/260205267.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/7610557926.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/anemia_ppt_template_free.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/mosikikinapodab.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_off0000f6a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A3 5192 bytes
SHA-256: e64cfeba897468aa402d8ff8c8eb0c25ead5886eb98a53a09d3828fcb3d62afb
font_01_sfnt_off0001081f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081F 10888 bytes
SHA-256: 4e315043c5a6d96d1060800136017ba1b249f3d4fd54239eb57b792f60bedecc

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