Malicious PDF — malware analysis report

Static analysis result for SHA-256 785e2079dcf9f20b…

MALICIOUS

PDF

74.5 KB Created: 2021-01-24 05:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: b19ba315be87b573c848f7b68bd4cf91 SHA-1: 38eb0ee8aa973350d26db9c97ba088fe2b24926f SHA-256: 785e2079dcf9f20b561ae353151b6fc1e276461ad689bf925d033ea8f96211db
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, with a critical heuristic identifying it as a link farm or SEO redirector. One prominent URL, 'https://leonvi.ru/123?utm_term=enable+webgl+chrome+2018', is flagged as a high-risk redirector. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing or trojan payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/123?utm_term=enable+webgl+chrome+2018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387566/normal_5fd64bfca5f8a.pdfIn PDF document text
    • http://vodabezoli.iblogger.org/goodnight_moon_eric_whitacre_sheet_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427103/normal_6004efba6d5c7.pdfIn PDF document text
    • https://cdn.sqhk.co/wanukawuwota/ijyZxhf/2295884312.pdfIn PDF document text
    • https://vasiwamalag.weebly.com/uploads/1/3/4/0/134012587/8729073.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416665/normal_5fe5328e8a3e5.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/wria8jb/hay_day_pop_download_iphone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425909/normal_5ffa0d4daa69d.pdfIn PDF document text
    • https://dolepaxutafajur.weebly.com/uploads/1/3/0/9/130969408/ef85636ea662.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412387/normal_6000d960f2b76.pdfIn PDF document text
    • https://buvekidi.weebly.com/uploads/1/3/0/7/130775196/2602023.pdfIn PDF document text
    • https://tujupanex.weebly.com/uploads/1/3/5/3/135333196/2956780.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409417/normal_5ffd62e38f919.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wasaxotudulolo.epizy.com/zinc_acetate_chemical_information.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/mobile_legend_mod_vietnam.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/nawabofajunatuv.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/10561076768.pdfIn PDF document text
    • http://rodiwube.epizy.com/33317480302.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/auckland_road_map.pdfIn PDF document text
    • http://waverotefiwob.epizy.com/modern_adirondack_chair_plans.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_off0000e288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE288 5744 bytes
SHA-256: b4034ec81be6ee487ef5acffc732ada11b56340bfaeae579f32d25b3a9e312d0
font_01_sfnt_off0000f608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF608 11332 bytes
SHA-256: 93a990e9edbe63698bf7705b404e97db931eb2fef3f8634861a53efabab6b8e3

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