Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b7c10b84ac444c…

MALICIOUS

PDF

83.6 KB Created: 2021-04-29 01:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 04dc1ca9089d934b848ce2515cf302ff SHA-1: c39f67214fd539d302ef35afad25ce147d4c3ba0 SHA-256: 08b7c10b84ac444c3d35a09287c082613db5002cb8d965d7ee434ec5732a0f91
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 phishing or SEO spam. One prominent URL, 'https://dugedepap.ru/strik?utm_term=what+is+the+largest+starbucks+drink+called', suggests a lure related to a search query. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dugedepap.ru/strik?utm_term=what+is+the+largest+starbucks+drink+called PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419629/normal_600f1aac82d28.pdfIn PDF document text
    • https://cdn.sqhk.co/boketumejipa/jjXhfhg/homemade_wedding_cake_decoration_ideas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464078/normal_606a7bb814b41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414677/normal_5fef50541b29f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376099/normal_5ff55627d7c4e.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/hGgdtiT/92577368663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476924/normal_606300dc5ec89.pdfIn PDF document text
    • https://pufopobumosuv.weebly.com/uploads/1/3/0/7/130776602/xawil_nozosi_jimavujedowi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384030/normal_5ff89e44cd86f.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvupewog/eKig4Sg/vexed_crossword_clue_7_letters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425255/normal_6054bc1fda619.pdfIn PDF document text
    • https://cdn.sqhk.co/fojevimexu/2hdF2gh/snow_trails_ski_swap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373782/normal_60098d0182216.pdfIn PDF document text
    • https://dozadekexojigig.weebly.com/uploads/1/3/4/0/134096874/zadilafuj_jijenuwusedak_guwiresifu_wokuxirak.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/7hdE0oS/91330415765.pdfIn PDF document text
    • https://rajuwirorevub.weebly.com/uploads/1/3/5/3/135306937/6422bc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460233/normal_602d0cc8da11a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378853/normal_60427ed600605.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459625/normal_5fe04df08d51d.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/jeduzizonox/zujejupaduwomuvinugu.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/19592837724.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/43920426940.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/proving_triangles_congruent_asa_aas_sas_sss_worksheet_answers.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_off0001079f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079F 5420 bytes
SHA-256: dab3f469ffa6de812c4b555c16f5c366936ffb141ee7517368698b4208f6a3a0
font_01_sfnt_off00011a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0E 11408 bytes
SHA-256: 2cba03e98d384aca631c05f065c12b4efd04dfd5f23157a9d299163d00f07464

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