Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebcac9de4cb27817…

MALICIOUS

PDF

72.3 KB Created: 2021-03-11 20:29:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d3a77e7f9787cf875f0901fc7364488d SHA-1: d8fe122748c9d0193edc0705f60d7707c65cd10c SHA-256: ebcac9de4cb278178fe1e882aa328f2f02edab0c4b0b5abbb9be6d298f7c6f59
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-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://gimoguvi.ru/123?utm_term=camaro+bumblebee+transformers+5 PDF link annotation
    • http://prodson.space/unearthed_arcana_5e_paladin0wbw7.pdfIn PDF document text
    • http://mybestchan.online/finance_formulas_cheat_sheetqy8qd.pdfIn PDF document text
    • https://rizedugo.weebly.com/uploads/1/3/1/4/131453818/botoge_sanomovot.pdfIn PDF document text
    • https://xagapetudiza.weebly.com/uploads/1/3/4/6/134686513/zoxoj_takesite_xowilufat_negon.pdfIn PDF document text
    • https://fexedewikefitug.weebly.com/uploads/1/3/2/6/132681233/6034478.pdfIn PDF document text
    • https://jopuwijexanubuf.weebly.com/uploads/1/3/0/8/130874501/f07096a8ccd.pdfIn PDF document text
    • http://pet-guru.shop/6499292615687uiy.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/sesafefanulokam/navy_football_uniform_unit_patches.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/tegegunepapoleriloxuza.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/xiforulorajilogil.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/backward_counting_20_to_1_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/47767448476.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/58726387868.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/gonujokekik.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/how_to_change_ipod_nano_1st_gen_battery.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_off0000dbaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAF 5080 bytes
SHA-256: d6889b1940211f8c5967d65bf5482ee462b3565076f6a68aca4974caf2081623
font_01_sfnt_off0000ecdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDD 12184 bytes
SHA-256: b88c1f7765840bd3a1e62559f89b65288fc71016b5fadb255b7911c48a64cc80

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