Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d60513574cd60c…

MALICIOUS

PDF

81.5 KB Created: 2021-05-11 16:40:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1bb2b473c237a9f819fb16870130ef57 SHA-1: 9b420c830304b3b3f965fe8f3632adcf89df6336 SHA-256: 68d60513574cd60ce0d4d333c2c79b9bc3dca0c4da2b1147c7a0203281f9a744
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://gimoguvi.ru/strik?utm_term=big+book+of+questions+and+answers+ferguson+sinclair PDF link annotation
    • https://todatotosikuped.weebly.com/uploads/1/3/0/7/130740429/xegikuramexokisimos.pdfIn PDF document text
    • https://cdn.sqhk.co/dasotipamu/BifV7ij/sugopekunelotimutojila.pdfIn PDF document text
    • https://dapiridefurewej.weebly.com/uploads/1/3/5/9/135987432/9079091.pdfIn PDF document text
    • https://cdn.sqhk.co/fogunedevare/DY1PgjS/blackberry_farm_2020_calendar.pdfIn PDF document text
    • https://rereviraret.weebly.com/uploads/1/3/4/5/134512362/cf301204.pdfIn PDF document text
    • https://cdn.sqhk.co/lufezeralon/icvZVhb/bukafik.pdfIn PDF document text
    • https://negofajosodin.weebly.com/uploads/1/3/5/3/135314147/b73d0.pdfIn PDF document text
    • https://bibasalerudo.weebly.com/uploads/1/3/1/8/131857029/4747018.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/dr8JAgf/40045151635.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/jivuxo/36506238790.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/45538107192.pdfIn PDF document text
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_a86777eb5d64461a8539736ae3bb6102.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/keto_diet_on_a_budget_-_low_carb_ketogenic_meal_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/what_is_the_easiest_song_to_play_on_piano.pdfIn PDF document text
    • https://69b3109a-7cce-4514-9193-d2106d9976ab.filesusr.com/ugd/3c2969_efe8ac258b84469b89c71bfad1410b3d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xubifupi/puwigowozojefuzomaz.pdfIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_46df828728874feeb4ff5d71b8515c46.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patotale/a_cup_of_tea_would_restore_my_normality_meaning_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/agreement_format_for_website_development_india.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_off0000fdd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD1 5660 bytes
SHA-256: 4af79f686c6dc84f9d89860796c947e5e0c670a6bfed24a91e06a50e8b810951
font_01_sfnt_off00011139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11139 11004 bytes
SHA-256: 0083cdedc2be1219aee11606e52f6ef207c10b493fcb1a7d2524b2bd0571b73f

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