Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e0c1790af4a852…

MALICIOUS

PDF

80.4 KB Created: 2020-12-28 17:50:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a6e4bc5a60881e6689fe02519f8fbac5 SHA-1: 68ab72dedc136c02350d39af22a7ff6f991f601d SHA-256: 39e0c1790af4a8524dc4489b1fc4b2f4ca4853b85383cce55a88a971db8deacb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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-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://traffking.ru/strik?utm_term=univision+noticias+34 PDF link annotation
    • https://zujomesesewega.weebly.com/uploads/1/3/4/9/134902804/jadukalokubabonitofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499972/normal_5fadcc74e01e4.pdfIn PDF document text
    • https://ropugobefele.weebly.com/uploads/1/3/4/4/134445072/3773637.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/04d11459-d5cc-4f89-b3fd-1af57a0c9a61/70054930547.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/billboard_music_awards_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/93336214564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e133079-66d0-4782-af31-c2ae71c99b4e/xopoxufomezaxomipaxeri.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/20647389716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cddd3e95-202b-4405-818f-198a155f446d/mariage_de_figaro_rsum.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/26371967620.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/guide_to_understanding_personal_finance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a024f92-a774-4d90-aeef-b518235e68b1/total_war_warhammer_bretonnia_army_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/283d58c6-6d78-4867-96fe-da456b4d8bab/jane_addams_high_school_bronx_ny.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/cmpt_lab_test.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/aines_y_embarazo.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/brandon_heath_jesus_in_disguise.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_off0000fc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC54 4968 bytes
SHA-256: 8e8a818ce98a99ca06464d23a9d8850379cba5ab3cc0a5e3549a960c4bcd6180
font_01_sfnt_off00010d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D66 11820 bytes
SHA-256: 13cf0dcb59659946f8375c1cb4eb3dbf4dd0dd1930db6d0a0898b1be2ab28885

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