Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e64c58af126a88…

MALICIOUS

PDF

68.8 KB Created: 2021-02-17 06:45:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 71b4cf3db5d1dc5d186f2c3c2c367bb6 SHA-1: 30c1d506c0dcbe251152fe834568314451ff7a77 SHA-256: 60e64c58af126a8853ff20b058028f895ac617cb02f8e07e31c96909cbd5d2e0
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning and phishing campaigns. The heuristic PDF_SEO_LINK_FARM indicates a mass of external links, with one pointing to a potentially malicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to harmful content or phishing sites.

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 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://leonvi.ru/wix?keyword=dog+shelters+in+miami+dade+county PDF link annotation
    • https://kajugomurabamuj.weebly.com/uploads/1/3/0/8/130814292/3f780f97c57f.pdfIn PDF document text
    • https://cdn.sqhk.co/nogawevorus/3jaijib/residual_definition_medical.pdfIn PDF document text
    • http://matrixbicycles.com/free_pharmacy_pocket_guideejd7r.pdfIn PDF document text
    • http://allostar.buzz/lajusaxovawabada5f4rq.pdfIn PDF document text
    • https://cdn.sqhk.co/dosijowikul/igEjiie/21100280482.pdfIn PDF document text
    • https://cdn.sqhk.co/busibelifiv/igieePN/tofejirid.pdfIn PDF document text
    • https://sawisede.weebly.com/uploads/1/3/2/6/132681865/cbe863c79.pdfIn PDF document text
    • http://laura-egorova.ru/793305264407nat0.pdfIn PDF document text
    • http://grinallex.shop/bekhayali_ringtone_male_version88fg1.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/niwotipugonuvoz/casanova_2005_dublado.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/93447744628.pdfIn PDF document text
    • http://degejukifukux.epizy.com/manualidades_de_carton_faciles_para_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/87664992231.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/eq_classic_alchemy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/beef_patty_nutrition_information.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_off0000cfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAA 5456 bytes
SHA-256: 2f8041f3c0deb1ba52d7998880b0a7d1b926c478f9e4309c3586b85b245dafbe
font_01_sfnt_off0000e21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21C 10784 bytes
SHA-256: d38c3e27cd24d369905666a06c010134aa01bd93d5844fbaaeb5b26fe647d8e4

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