Malicious PDF — malware analysis report

Static analysis result for SHA-256 828f25a8b8c69509…

MALICIOUS

PDF

78.5 KB Created: 2020-11-11 17:45:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5c39447fa5a430f5eec3fd2acfe8c9a2 SHA-1: 768e1d2eb4c58df77e5f8641bcdadb135117a7be SHA-256: 828f25a8b8c695098af3e1d7aa2aa132dd7a096d138421e87b8ec27d160e9f62
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits malicious characteristics, including links to known redirector infrastructure and a large number of external PDF links, suggesting an attempt to manipulate search engine results for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/aws?utm_term=canon+eos+sl2+user+manual In PDF document text
    • https://wemibevufiwoseb.weebly.com/uploads/1/3/0/8/130813314/c8894ee88cf05.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/fuwetotip-leponukobo-mudar-kixojabojarem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366316/normal_5f87da88a3465.pdfIn PDF document text
    • https://xazojitov.weebly.com/uploads/1/3/1/4/131408465/simimadifos_natukofuduba_lariraxigezige.pdfIn PDF document text
    • https://terowibew.weebly.com/uploads/1/3/4/3/134370771/3573504.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394062/normal_5fa41db9384a9.pdfIn PDF document text
    • https://jiwamotezonadiw.weebly.com/uploads/1/3/4/3/134325797/8f42ad3bddf9591.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/4b8487cb-3fab-4128-9b77-78ff58d0fc87/bedolurajagamefovoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac6b3b4b-dbe2-4411-a78f-712c720607f1/ripuzopuwivemisididom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f91021f-a5b0-46c8-9d31-3579edaf9e75/5643367807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf523184-35ca-43de-a434-5abbeeb8a7e3/48910433742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/471a7256-e0d1-4ba4-a6e6-e80996487474/45161545899.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0F 13628 bytes
SHA-256: 3c46c1a37b7e26b158c0cbcb9f05d1cf842e75f00ebad5f7cc621f78cf261a9f
font_01_sfnt_off0000f7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FE 4868 bytes
SHA-256: 367d9371d8b5bfbb77d75df7cc0705c2a84d7e153fe29a8ab998dcd195b4c36a
font_02_sfnt_off0001086e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086E 10660 bytes
SHA-256: ef6a090720edd71221f015b759fe14fa2482d75f1a8011f776116e1a35b4a22d

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