Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9ea85995ac9f11…

MALICIOUS

PDF

91.0 KB Created: 2021-02-22 15:55:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1445264f01f1d5023ff9f839632d71c5 SHA-1: 9822a6ec0534072a3ed1cf60ff409b0c38893729 SHA-256: 0e9ea85995ac9f1178ddfa37f619ce4d23fbb0fc10fe81205180d36e12e03ba3
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a redirector link to a known malicious domain. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous links on disposable hosting further supports a malicious intent, likely to lure users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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://crophysi.ru/wb?keyword=keystone%2070%20pint%20dehumidifier%20filter In PDF document text
    • https://cdn.sqhk.co/jawafurovif/xMYUrhg/gogajerapanoxepez.pdfIn PDF document text
    • https://cdn.sqhk.co/keropolor/eLROgc3/41833186598.pdfIn PDF document text
    • http://itawegan.space/kenon_holdings_ltd_annual_reportdpzaj.pdfIn PDF document text
    • http://ashotik.space/yandere_x_male_readernp31q.pdfIn PDF document text
    • https://cdn.sqhk.co/lodesejidi/hegjtLe/kodimugamuvasakasu.pdfIn PDF document text
    • https://cdn.sqhk.co/peposusuwi/igdiiif/56941300838.pdfIn PDF document text
    • http://lakshmi-store.ru/stenhoj_ds4_manualdl28s.pdfIn PDF document text
    • http://wefigofozotime.22web.org/wazesuriz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gukupexokopiwug.epizy.com/openfoam_guide_v6.pdfIn PDF document text
    • http://paritoxo.rf.gd/loxabozabomuro.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/realtor_luncheon_invitation_templates.pdfIn PDF document text
    • http://vamagirizotaro.rf.gd/59843901041.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/tilededonegofusisemonu.pdfIn PDF document text
    • http://mopezit.epizy.com/49263595531.pdfIn PDF document text
    • http://dalefiza.rf.gd/xewakim.pdfIn PDF document text
    • http://bazodumijot.rf.gd/asda_bedding_valance_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/fekusonujeregajajilorijad.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_off00011254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11254 5896 bytes
SHA-256: 7a5178b744e49c2d1334e10f32596bd67982204f4d465e9c0fb1d4033726f673
font_01_sfnt_off00012679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12679 5364 bytes
SHA-256: 76e738bf1228a89351d1c1a93ed500463ef17ff4eb8095d90a377e19bc285628
font_02_sfnt_off000138a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A4 11200 bytes
SHA-256: e697723e8cc23f7dc71ca39f7ecfe51859be0c540d8ce785d282572f5eecf45d

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