Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a5929bc21642853…

MALICIOUS

PDF

64.5 KB Created: 2020-12-07 05:49:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 783008b6e179e686f837d1fe71ba3d3b SHA-1: 1c6ed839dedeb802e0dce599b51bda362eb074d1 SHA-256: 2a5929bc2164285365866e660e38ac6db27a9432a7536417d2d5812ab3698eb7
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, many of which point to a redirector URL (https://traffset.ru/strik?utm_term=rivertown+crossings+mall+movie+theatre) that is flagged as a phishing lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting an attempt to game search engines or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffset.ru/strik?utm_term=rivertown+crossings+mall+movie+theatre PDF link annotation
    • https://xulajaxosu.weebly.com/uploads/1/3/4/3/134366267/3827857.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421969/normal_5f9ed1bc64872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470532/normal_5fadbbfd533cf.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/vuzufexarevima/34562758253.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/excel_concatenate_date_and_keep_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/052dbb3f-dbad-46f7-8799-097b009ec956/blue_planet_dvd_coasts_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdabd5bb-2988-456d-990e-1e8490658a95/last_day_on_earth_survival_guide_expired.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/gitex_2017_exhibitor_list.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/fozogilolokizuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8213d5d-ce54-4042-9406-ae37389898df/85912002645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c809b05b-2505-4473-9aaf-b0f2fc4a38b9/basic_derivatives_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cb2f21e-237d-47a4-8859-bf7796ba2838/60088618126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e82efc9b-a5c9-4df9-b27a-45a3ecd5c2b3/85817580375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f02c078-0017-4c68-a09d-57837961c5ae/jegoxubugiludixilexukalu.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/holy_bible_app_king_james_version.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 1

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_off0000bcbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCBD 5372 bytes
SHA-256: 2c1ae5985465bc7f53b8846ca80077fc1b864bd53d56705acbd3d18d3e67fc7c
font_01_sfnt_off0000cef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF1 11232 bytes
SHA-256: 0e2063fdbba2e9322e63b5e9d34ea9749d4d445b04aca311f4d67f9353e819d8

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