Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0af9320f5e64545…

MALICIOUS

PDF

73.7 KB Created: 2021-03-15 06:59:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7ea80c8600d422b9868f2fcb935b77ee SHA-1: 592925c0185c529b34a6012a16c949f250c8d4dc SHA-256: b0af9320f5e64545a073f70437312f2244ca0ca0e486f213578d6a1b0c0883de
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 0.9997

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://baarspo.ru/wix?keyword=belleville+district+118+staff+directory PDF link annotation
    • http://fruitik.space/sobalavawukikivtn0kt.pdfIn PDF document text
    • http://winoorama.website/denulerubimepogipoponebinysvto.pdfIn PDF document text
    • http://baffer-shop.space/wiwugdnxi5.pdfIn PDF document text
    • http://accueilcmb.com/jaxinuvarj1ht.pdfIn PDF document text
    • http://salearea.pro/begopuwiweryq57.pdfIn PDF document text
    • http://fb-ig-copyright.com/kanituhefvo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d67285a-e3c5-4820-bb1a-bb91ce1079a6.filesusr.com/ugd/d54300_a270382b41a34a0bb828021e37783ba3.pdf?index=trueIn PDF document text
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_b06b88901d77443e9b071068a1c3dd4d.pdf?index=trueIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_fbb2ac478af44d33a9077043d6f1adb9.pdf?index=trueIn PDF document text
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_4ed2c323cb9a4b268d1dcf6088bf57d8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wixanarer/96901387579.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/please_change_bed_sheets_in_spanish.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_10f02def07f6499db6c36be8ebb4a7bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kaxukok/how_to_solve_angles_in_parallel_lines.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/mikogu.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/anarchy_online_leveling_guide_froob.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/76173197673.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/nirukotosok.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/41606659092.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/alkanes_reactions_worksheet.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE161 5472 bytes
SHA-256: c4b061c42453be9ab7c66b90494a04d50d9cd660882510930f302f7fd22969cc
font_01_sfnt_off0000f427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF427 10852 bytes
SHA-256: 9ab4d429847e60a76b36c3f0483369c8ff7418c988f0f967a03b189909107e43

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