Malicious PDF — malware analysis report

Static analysis result for SHA-256 448f45c797d1a45d…

MALICIOUS

PDF

77.1 KB Created: 2021-04-02 19:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f2de9d5ed47ae34c6ce06d04a5bb9cfd SHA-1: c2dba78ed464e191152165e5b1c7405d643bfedd SHA-256: 448f45c797d1a45d0eb78f9e9f72d7000bbf65a26c8ef5a0bb627eeca4e016a3
246 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://dugezuwodovapa.weebly.com/uploads/1/3/0/8/130874298/medotixir-gaxafuzunar.pdf.
  • 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://golowaki.ru/123?utm_term=animal+abuse+report PDF link annotation
    • https://dugezuwodovapa.weebly.com/uploads/1/3/0/8/130874298/medotixir-gaxafuzunar.pdfIn PDF document text
    • http://sokegex.mywebcommunity.org/sazekanelujadilubu.pdfIn PDF document text
    • https://cdn.sqhk.co/xawefigi/aiggijj/notemomirisiremil.pdfIn PDF document text
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/panazor-xabata-ruvilugeboma-dadigox.pdfIn PDF document text
    • https://pejapuvurexoku.weebly.com/uploads/1/3/1/6/131636728/fad5695f2a222.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487622/normal_60558663a069b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426813/normal_6039b2b20144a.pdfIn PDF document text
    • https://zubetotuduve.weebly.com/uploads/1/3/5/3/135340520/e4cbcf81.pdfIn PDF document text
    • https://cdn.sqhk.co/rorexamuviz/eZjgDjd/zoxajunexev.pdfIn PDF document text
    • https://cdn.sqhk.co/zapimafe/ajamrby/speedometer_repair_phoenix.pdfIn PDF document text
    • https://gufekesunix.weebly.com/uploads/1/3/4/8/134888283/5d3666f041e2.pdfIn PDF document text
    • https://cdn.sqhk.co/tefaxobaf/Sjahghd/95561529601.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/oNgdbjb/33527720047.pdfIn PDF document text
    • https://devubavoxonor.weebly.com/uploads/1/3/2/7/132741482/wosezotiliwogez_lolopaposemono_bekemefomagebat.pdfIn PDF document text
    • https://xuvagava.weebly.com/uploads/1/3/4/8/134879605/waxip-disivumazese-durakus-xafifumitasif.pdfIn PDF document text
    • https://sodikisug.weebly.com/uploads/1/3/1/4/131437766/7487115.pdfIn PDF document text
    • https://mulibini.weebly.com/uploads/1/3/4/8/134881685/pevekalebekowe.pdfIn PDF document text
    • https://pigiwikabulate.weebly.com/uploads/1/3/1/8/131856715/c1329bad7.pdfIn PDF document text
    • https://fojanatixisi.weebly.com/uploads/1/3/4/2/134265346/jejade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488842/normal_6023768226ae5.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/34957877251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452852/normal_6012c58d66f70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407057/normal_604492ed67619.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zininorenedalo.onlinewebshop.net/affective_fallacy.pdfIn PDF document text
    • http://subogerilazelo.atwebpages.com/que_es_dibujo_tecnico_urbanistico.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF195 5092 bytes
SHA-256: 569bfae4f62e6556b6a681d4bb56e7b270df55df5a25d185de10af491ceb11a6
font_01_sfnt_off000102c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C3 10708 bytes
SHA-256: 85ad5e7dfa5f42d5e3ab50b1af3aa460e84e523e3f16c59d02fcbdace7646d2b