Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b61db230b6b820…

MALICIOUS

PDF

90.0 KB Created: 2020-12-31 08:29:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3eb21045c186280b9c06cfe44f91bf3e SHA-1: c3858bdaac23f9a39896b4e8c0148b226307aea1 SHA-256: 28b61db230b6b8200e968569192b1e02f559a714375c3f8e69c3d183850ec467
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/123?utm_term=sistema+de+procesamiento+de+transacciones+pdf'. This URL is likely used to lure victims to a phishing site or download further malicious content. The ML classifier and ClamAV also strongly indicate maliciousness, consistent with a phishing or trojan delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://ggtraff.ru/123?utm_term=sistema+de+procesamiento+de+transacciones+pdf In PDF document text
    • https://cdn.sqhk.co/mugapowejog/gjHitcj/rolekemufatota.pdfIn PDF document text
    • https://cdn.sqhk.co/gisusisabez/jgr6jfv/zombie_hq_game_download_for_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379610/normal_5fcb6022dcc22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371787/normal_5fa3aede7362d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajixe/nisazibifo.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/tudojadaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d9e8451-137f-4d3a-b799-3d5c07f2f2a5/osrs_canifis_agility_xp_per_hour.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/73896745885.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/jaromitokezalesadafuki.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/system_support_engineer_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/chris_brown_songs_list.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/caseina_que_es.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fd724a1-ba9d-4f3e-a944-7d74f7046deb/magipozugipasegazi.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001223c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223C 5372 bytes
SHA-256: e58740bae3730d389369667dc50f71829c63291ae87986336f1334e5fe6e7642
font_01_sfnt_off00013468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13468 11168 bytes
SHA-256: 930b382cb186e456b7efb0797f248d02b983a9f33ea6372c83cffc3ffff80f59

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