Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cec2ce9e421ae2c…

MALICIOUS

PDF

84.6 KB Created: 2021-06-05 09:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9e3a0d278de30e6dfcc9f63c3c79629c SHA-1: 6682192eddb1c77e5207f8df2a1961fd94c24a47 SHA-256: 7cec2ce9e421ae2c75b0f57f2233604420be01cf692344802296f00ae1899db1
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is classified as malicious by ClamAV and an ML model, exhibiting characteristics of a link farm designed to redirect users to numerous external sites. The document's body text, though heavily obfuscated, appears to be a lure related to an "ice fishing report." The embedded URLs and the heuristic firings strongly suggest a phishing or malicious redirection campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/123?utm_term=keyhole+ice+fishing+report PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4452157/normal_60b27e7e85251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495413/normal_600c56e161432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481662/normal_6067c5ae91bfd.pdfIn PDF document text
    • https://wuginimujewege.weebly.com/uploads/1/3/4/7/134714977/rizevi_gowezubobax_zonawe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_5fd7fa5707247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486521/normal_601fa0d52fa39.pdfIn PDF document text
    • https://kisuwirabavaruz.weebly.com/uploads/1/3/3/9/133999170/4afca4084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409813/normal_604f2a739d302.pdfIn PDF document text
    • https://bovakexigi.weebly.com/uploads/1/3/5/3/135314068/lifenoremokek_luwarulilubaw_webegekuxiro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505687/normal_60ba3ced4feff.pdfIn PDF document text
    • https://fujovufizopi.weebly.com/uploads/1/3/2/7/132710671/1123393cd03b0.pdfIn PDF document text
    • https://wotipufa.weebly.com/uploads/1/3/1/0/131069738/wisenijulutuma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453719/normal_60224ac7a0c2a.pdfIn PDF document text
    • https://ranadapibefa.weebly.com/uploads/1/3/0/8/130874213/gizamoxatarifo.pdfIn PDF document text
    • https://tezonebikinigax.weebly.com/uploads/1/3/1/6/131637870/pixizezifa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8cc3fca8-27fa-4ed6-8f68-2523b746594b/66858421612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae4ae0c4-e5d0-402d-a979-3e1bce1ad88c/kuxulaminunajawebov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3f5d2df-c40f-4adb-bd00-c9537518f8ee/how_to_check_transmission_fluid_in_vw_golf.pdfIn PDF document text
    • http://watusuxipidu.pbworks.com/w/file/fetch/144423567/59004548369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d5fcf60-c15b-4220-9ea1-1772e27430e2/what_is_my_zodiac_sign_december_21.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc274636-e308-4560-a1d1-92b867ce451e/senobutig.pdfIn PDF document text
    • http://kinuwibe.pbworks.com/f/aaro_nenjil_mp3_song_free_download.pdfIn PDF document text
    • http://wepoline.pbworks.com/f/jemaworizonowixodadidumes.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_off0000ffd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD2 4924 bytes
SHA-256: ddd69ef8ec017e69a7a6b23e604afb92862e064728b6ca500dd9e81cf536edb3
font_01_sfnt_off00011096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11096 11124 bytes
SHA-256: eb472155f57f64a767d2fb2882d200199e388e6938c85b3b1d6c38d18319c51b
font_02_sfnt_off0001367a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1367A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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