Malicious PDF — malware analysis report

Static analysis result for SHA-256 992014ca28a50408…

MALICIOUS

PDF

72.3 KB Created: 2020-12-21 10:12:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 1a2ad266bc36e151ee185bdaccb6246f SHA-1: f08e3a8e5bb8840fa9d886ed18e6376d8dbf4d7c SHA-256: 992014ca28a50408fbe183c916653e9cf760e4bb8d1daa86bc378f7d257eb92b
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK'. These point to URLs like 'https://trafficel.ru/strik?utm_term=houzz+open+concept+kitchen+family+room', which likely serve as redirectors to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF.

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://trafficel.ru/strik?utm_term=houzz+open+concept+kitchen+family+room PDF link annotation
    • https://norajaxufok.weebly.com/uploads/1/3/4/6/134611117/letenuzosufefafaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486523/normal_5fad72bb3526e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481520/normal_5fcfedbb0148f.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/f021b080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454803/normal_5fa8788f2ef80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454286/normal_5fac5d161e9e8.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/zesorenuwasikajipez.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/8852288.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/dojonuta/pokemon_go_shiny_alola_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/20463938389.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/vabesegotena.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe123f61e25426e100b56f/1606292032607/sunbeam_electric_blanket_f2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e70d1452f90b7fe56088/t/5fc1de9a3c02f22b9d517cbb/1606540955043/retroarch_ps_vita_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/6584745215.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_off0000d39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39C 2900 bytes
SHA-256: 68d094faf81d2ea9f62e68ee4e789e40b6192f27e323b9e50c58fbaa8f881837
font_01_sfnt_off0000dddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDF 5252 bytes
SHA-256: 4315a3deadda25bd1b6464b438edf87579c248d73f12237b285f36e3d7608bed
font_02_sfnt_off0000efab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAB 10640 bytes
SHA-256: fb7ff2b2bf56847fc3339bb6f2d7d1c1c740e7e26e9696d34b51e253e1fc873f

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