Malicious PDF — malware analysis report

Static analysis result for SHA-256 3281eda5ed5dee2f…

MALICIOUS

PDF

60.9 KB Created: 2020-12-02 16:52:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a9dfb0813f06d498b363eecf391ff956 SHA-1: d97ea184d392dcbe8d6d42962b3b13dd70d609a2 SHA-256: 3281eda5ed5dee2f6bbd022cf831e106c956b0279dc77e452b432df00e32f2c1
206 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a screenshot disguised as content, with embedded links designed to redirect users to a link farm hosted on disposable domains. The primary malicious URL identified is https://trafficel.ru/aws?utm_term=algebra+2+matrix+review+worksheet+answers, which likely serves as a gateway to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 60 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://trafficel.ru/aws?utm_term=algebra+2+matrix+review+worksheet+answers PDF link annotation
    • https://dujibirarikow.weebly.com/uploads/1/3/4/3/134321406/fimowizijefaled-jasukevijosisa.pdfIn PDF document text
    • https://lisevududotuwak.weebly.com/uploads/1/3/4/2/134265384/fusejojezabasovema.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/vifeneduvaka.pdfIn PDF document text
    • https://xenifopiri.weebly.com/uploads/1/3/4/5/134507673/wunekufu-zirus-foxezuwurugo.pdfIn PDF document text
    • https://baduzizexajozej.weebly.com/uploads/1/3/4/6/134653824/4911742.pdfIn PDF document text
    • https://boxavaruju.weebly.com/uploads/1/3/4/7/134759985/vazawal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379221/normal_5fa9e32c63dc6.pdfIn PDF document text
    • https://wuvepudikuj.weebly.com/uploads/1/3/4/7/134731811/ligefep.pdfIn PDF document text
    • https://gumakamatiz.weebly.com/uploads/1/3/4/6/134600955/7883902.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://static1.squarespace.com/static/5fc0e006a879396864083677/t/5fc3349f9b1ed0353845449a/1606628513321/26658890061.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37b95763-465f-4ac1-acce-252589e3f3a9/98482090094.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f48ccde-ba59-4325-9edb-19f4720037f6/nujosegilejalevewotok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40c2e7bd-be14-4f41-8456-4129d2c52e7d/birokutipatede.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_off0000a9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9FC 5432 bytes
SHA-256: f9808106702c28b8071bd58aa67e3ffda427b1226c5b40d51114e440629a523c
font_01_sfnt_off0000bc5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC5C 8360 bytes
SHA-256: 9b29cbbe8597cbe307557afc0aafd48be8044e66b12b684a7ff073cb63d6744c
font_02_sfnt_off0000d8d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D1 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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