Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2e2c85bf7d6a6c…

MALICIOUS

PDF

78.3 KB Created: 2021-02-27 07:09:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f4066e77440b4200a9b07c1be695e34a SHA-1: 79d7a1c2cb2f9a447eac51f78348437b46509eda SHA-256: fa2e2c85bf7d6a6ce64019279319ca243a08e6cb5fceaa7cf96660071b432638
146 Risk Score

Malware Insights

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

The PDF contains multiple external URLs and is flagged by ML classifiers and ClamAV as malicious. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, consistent with callback phishing. Although no scripts were explicitly extracted, the presence of numerous external links suggests a potential for downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://resalured.ru/strik?utm_term=long+john+silver+breakfast+menu+price PDF link annotation
    • http://bizelapeto.iblogger.org/psd_to_with_text.pdfIn PDF document text
    • http://vurujupafowutox.mypressonline.com/gotiworizobafis.pdfIn PDF document text
    • http://bikomowaxibujoj.medianewsonline.com/pupunewubovidineralepil.pdfIn PDF document text
    • https://laximazerafa.weebly.com/uploads/1/3/4/2/134235816/44498617.pdfIn PDF document text
    • https://gileledera.weebly.com/uploads/1/3/0/8/130874536/gixiwal-nirawiwa-mafuxubig.pdfIn PDF document text
    • https://mezepobavufu.weebly.com/uploads/1/3/4/7/134717124/1381838.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/dswghji/swat_team_positions.pdfIn PDF document text
    • https://widowajezow.weebly.com/uploads/1/3/4/5/134584852/4656863.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/average_salary_for_graphic_designer_in_chicago.pdfIn PDF document text
    • http://afracheat6.xyz/xiwaxerobuweamyyd.pdfIn PDF document text
    • http://vubopukupera.22web.org/visoraxekewatolipodarino.pdfIn PDF document text
    • https://sajulivos.weebly.com/uploads/1/3/1/1/131164476/rulijut.pdfIn PDF document text
    • http://fomuvegikutidob.iblogger.org/boguzuxafuvamekenexelid.pdfIn PDF document text
    • http://paselon.getenjoyment.net/twilight_graphic_novel_volume_2_free_download.pdfIn PDF document text
    • http://sokfresh.fun/antonyms_worksheets_3rd_grade7wg61.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zijedan.atwebpages.com/save_the_cat_blake_snyder_espaol.pdfIn PDF document text
    • http://jafufalabo.rf.gd/somipuxiluguw.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_off0000eaf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF3 5712 bytes
SHA-256: 229853e32f19950cae2cb7fad89010380ed8f677398489e32cec791449785d9d
font_01_sfnt_off0000fe4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4C 14700 bytes
SHA-256: ad04efbb73f1221b5953e7a209a9138e8b2bd74b13c57c57f433071aac450f3b

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