Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb90607c45ff1de…

MALICIOUS

PDF

69.5 KB Created: 2020-11-25 19:29:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a6aa4c04a5ec431bd3ca10e545bb0be9 SHA-1: ef200021d328ea822ed03c9e94a491655d5e85a6 SHA-256: bfb90607c45ff1de95b2a7037ae5697785fde67240a6e0baf4ddfd9addf28c77
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 link to a known malicious redirector, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

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://gettraff.ru/strik?utm_term=colonial+school+district+delaware+rating In PDF document text
    • https://sepanafawo.weebly.com/uploads/1/3/4/3/134316973/baforegowej.pdfIn PDF document text
    • https://gilepinewuje.weebly.com/uploads/1/3/4/0/134096317/1d8a0236d4.pdfIn PDF document text
    • https://lozagazol.weebly.com/uploads/1/3/4/2/134266804/keduzere.pdfIn PDF document text
    • https://tizomejina.weebly.com/uploads/1/3/3/9/133997236/ganigadisor-bekepububaniv-pagofiga-zutij.pdfIn PDF document text
    • https://zefisuket.weebly.com/uploads/1/3/4/8/134868467/xiduda-nogak-tizugater.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1797cb48-2c14-4588-9819-8b2c854bcbf1/teen_wolf_season_5_episode_8.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/nasefuzexifuzaxavurutam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdec2eec-2810-4511-ab2d-8fa74dd57b92/gebixinozinowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/949cbb3f-0f9a-4509-a2d3-c6758b312ce8/louis_vuitton_shoes_size_chart_in_cm.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/sopenebeviv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4da7bcd6-177b-48e0-9044-d5791a017ffd/fikumokero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c7efcc8-01da-4fcd-9acb-b8b607782d7f/tyler_sis_affton_mo.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/bets_to_make_with_couples.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/gelifuvitosatelobelir.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_off0000d38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38E 5200 bytes
SHA-256: 0ddddac1632dcb094eb790640645d9f787ff06784915bb6469d405882fa200f3
font_01_sfnt_off0000e545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE545 10560 bytes
SHA-256: 86a7059c38b08900e5888d4305fe957353daf6687c9fcdfa80dd366b51ce4802

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