Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d9ce64c92c60dc…

MALICIOUS

PDF

73.0 KB Created: 2021-01-22 16:57:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 14bca29642ce0eb4e07a234ad151fc23 SHA-1: 306fab8c36be51d86f01fa704c381e5db3ef8472 SHA-256: e4d9ce64c92c60dcecce31f2ee47c8ab761c9e7079381cd84906d817f71b0f71
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/123?utm_term=whrsd+school+calendar PDF link annotation
    • https://javagiluxonuv.weebly.com/uploads/1/3/1/4/131406569/e5073d5efd.pdfIn PDF document text
    • https://pewovejike.weebly.com/uploads/1/3/5/3/135319851/josubakuzuzilopu.pdfIn PDF document text
    • https://gefotumazemi.weebly.com/uploads/1/3/5/3/135331531/2641570.pdfIn PDF document text
    • https://noperutepa.weebly.com/uploads/1/3/4/7/134721309/711967.pdfIn PDF document text
    • https://sitoluvumoroge.weebly.com/uploads/1/3/4/7/134762666/dirudevijopoxix.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/iicgc1P/knights_of_labor_union_leader.pdfIn PDF document text
    • https://site-1245151.mozfiles.com/files/1245151/audio_engineering_software_free_s.pdfIn PDF document text
    • https://site-1173807.mozfiles.com/files/1173807/63626203359.pdfIn PDF document text
    • https://site-1168066.mozfiles.com/files/1168066/meteor_shower_animal_crossing_new_horizons_time.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/Boljcib/lufawexubisegofidil.pdfIn PDF document text
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/de6550.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/forupokisip/59157473799.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/anno_domini_1257_guide_fr.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/54174616141.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/vojagajulekupanamigoj.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/you_re_beautiful_phil_wickham_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/free_mailchimp_event_templates.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_off0000e0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E2 5040 bytes
SHA-256: aea986c237af26091d45524ccf7c96caf0949a056ebefa9a658e35157f0656bb
font_01_sfnt_off0000f20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20C 10812 bytes
SHA-256: 3589c79377db6075782b44b5e61243d72eb89242316b6d7f8df37bca9f34cd67

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