Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d9b046f429a5f2…

MALICIOUS

PDF

80.2 KB Created: 2020-11-18 20:04:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 100fc1e3a22620e8cf1eb9252479031f SHA-1: d2c6cf8c2466ae8fa20fc731589838f83bf1472e SHA-256: f0d9b046f429a5f2fecb1cf69b4b73cb50b79505be849a057dc836b1a3c3f09a
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://trafficel.ru/strik?utm_term=melee+20xx+4.+06 PDF link annotation
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/miwivojo_kepokolakomow_rezapozige_wetosumi.pdfIn PDF document text
    • https://rixemeja.weebly.com/uploads/1/3/4/7/134711448/wamaxavav_wabuwugibobifuv_juxosasaxu.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/21ab799c1be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383302/normal_5f8e959d3996b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501810/normal_5faf37491472c.pdfIn PDF document text
    • https://tavadubamik.weebly.com/uploads/1/3/4/4/134473349/bedobos_dopumitakaxi_xososesezejase_sadumorizadowap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386594/normal_5f8f6b3bed793.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d2b18916-db5e-49d7-a12b-21b598bbf74e/25629319862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f0d5892-d150-4d1c-8271-da8b74083c4a/bulokeriwag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48977dec-26d7-41f8-ab5e-242283722565/diseo_de_pavimento_rigido_metodo_aashto_ejemplo.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/principles_of_agrarian_reform_cooperatives_and_taxation.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/mavic_open_pro_cd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de3aecf0-ae3b-4777-a49c-476b54921c3a/nafobukopise.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF083 4260 bytes
SHA-256: 1b0e97058a4a319445d757a4ce0a01dd9eecd846eec670d43c2876c1b6b02319
font_01_sfnt_off0000ff04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF04 11692 bytes
SHA-256: 9832a08d63500b891c3c040d4d60b73091f7ed03fa92b717145de848e26f9995
font_02_sfnt_off0001264b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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