Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6a9c91496afca2b…

MALICIOUS

PDF

67.5 KB Created: 2020-12-27 08:01:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 0e822b5940a4f74187be560c80b225f3 SHA-1: 7ec2e18dfbb5d0779dbc5b52a1e6c90d02a356ca SHA-256: d6a9c91496afca2bc3368214030848daa8133bd1d61b228f13b50bdd5a2aeed5
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as a link farm, containing a large number of external URLs. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to direct users to potentially malicious or deceptive content, possibly for SEO manipulation or phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffi.ru/aws?utm_term=gali+chirugali+dj+song++mp4 PDF link annotation
    • https://cdn.sqhk.co/zoturisa/gghBIij/kuzidovageka.pdfIn PDF document text
    • https://cdn.sqhk.co/pufojoloz/ggJgc75/photo_collage_maker_website_free.pdfIn PDF document text
    • https://zotadipijipas.weebly.com/uploads/1/3/4/4/134467791/ratiwomupawex_sokajir_mebufufosifofu.pdfIn PDF document text
    • https://funefazadoma.weebly.com/uploads/1/3/4/6/134648765/dovizutubipirepo.pdfIn PDF document text
    • https://xakukanezo.weebly.com/uploads/1/3/4/8/134898234/1e8939f05e0.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/TQcjJhh/zideviwi.pdfIn PDF document text
    • https://cdn.sqhk.co/mofosalamo/bijljeO/offline_games_for_pc_download_windows_8.pdfIn PDF document text
    • https://vimasavugaf.weebly.com/uploads/1/3/4/5/134587410/nasofumukisokakuwu.pdfIn PDF document text
    • https://tezijiso.weebly.com/uploads/1/3/4/6/134690371/piresizawewezat.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/mogosaboxebagax.pdfIn PDF document text
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/dugagofosoke.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/palevijuj/84619109982.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cd6bc92-054d-476c-b8b8-9cb26c37c419/fifagobabagupatavowizog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fcb841e-d4d9-45c7-aca8-431837e0466d/pomixitezimulelerunadetir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5689549f-232a-4990-8e27-62147b06127e/mastering_software_quality_assurance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1cfa325-3827-4ce8-9c1f-061f1f28fd7f/25925070783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68ffe7e6-61d4-41fa-ab69-81c3014231d7/witonurelabudalimobi.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_off0000ca2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2C 5684 bytes
SHA-256: 560880f45c8d4443e745bc147203190c0cd1244443f46d30c378aa633c1c3c70
font_01_sfnt_off0000dd62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD62 10496 bytes
SHA-256: 7dc7e19e4bf83b80e65643e52a7648d610503598c8012d2f02b6e304eb119b04

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