Malicious PDF — malware analysis report

Static analysis result for SHA-256 366f854254ba7ab7…

MALICIOUS

PDF

66.0 KB Created: 2021-01-03 04:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 70cd5b5c5eb655ce0fab6fdc0c0308e2 SHA-1: 028044073453e533fa94293f94afa4212171f0fe SHA-256: 366f854254ba7ab7099bce79f558845388b8f99c469909d7e35d5a7b1ecacc2c
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-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://trafftec.ru/aws?utm_term=temperature+conversion+worksheet+3+answer+key PDF link annotation
    • https://cdn.sqhk.co/fakobijo/ghjghag/sumugelajolotusasoxafu.pdfIn PDF document text
    • https://waziketezu.weebly.com/uploads/1/3/4/6/134648841/5537028.pdfIn PDF document text
    • https://cdn.sqhk.co/nudotunaza/iBhfuih/jdm_cars_wallpaper_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/xilelawemu/9gcyTid/pawaxerijetuvemo.pdfIn PDF document text
    • https://guvoruba.weebly.com/uploads/1/3/4/7/134742814/selepenifewolufe.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/b1da6b7d-4969-492f-8a48-277dab15878b/background_data_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63707428-83ac-4a8a-8bfe-334f3236c9af/city_of_san_diego_business_license_fee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/759860e1-8da3-49b7-899c-c9480a6e9177/93061457363.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/72484598630.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/rubevowag.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/citadels_board_game_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/79894555240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a28200-7210-4787-91fc-2a977788c909/33455641184.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/wilanifavuvagakeg.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 8

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_off0000c498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC498 5572 bytes
SHA-256: d8fec276ad24afcdc4832ea63fc3e05700dffd4a6694954c5693210b3998a769
font_01_sfnt_off0000d77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77A 10464 bytes
SHA-256: 67f1b46f3893d697e1e32811770171c1fea64f8b7c0e3049d4752b385baec65c

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