Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b08de2d3fd112d0…

MALICIOUS

PDF

73.1 KB Created: 2020-12-30 20:04:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 06c3343ef501fa852ee0a5bb5efa60a1 SHA-1: 20d2ad48d3b5a68bfa56d3d2f239e1c04bf5694f SHA-256: 6b08de2d3fd112d0404ce06f1179eebff06eb1d54a6266090c7e69c8eceb2a2e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various websites. The ML classifier and ClamAV also flagged this file as malicious, with ClamAV specifically identifying it as Pdf.Phishing.Trojan. The presence of embedded URLs and the nature of the heuristics suggest a phishing or malicious redirection attempt, likely to distribute further malware or conduct scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://trafficel.ru/123?utm_term=hello+love+goodbye+movie+budget PDF link annotation
    • https://puvomowaja.weebly.com/uploads/1/3/4/3/134318832/2bfe47157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_5f97c3b2260d3.pdfIn PDF document text
    • https://cdn.sqhk.co/waderapal/iiidt42/pearl_art_store_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/norifasil/ahgZjhH/download_hovercraft_takedown_mod_apk_1._5._4.pdfIn PDF document text
    • https://zupipozove.weebly.com/uploads/1/3/4/5/134589893/jujavoverigu-vugilabomudoded-vozur-kezedebe.pdfIn PDF document text
    • https://cdn.sqhk.co/kujusiru/mqihGnI/royal_caribbean_cruise_ships_number_of_passengers.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/c376d3de-bf90-4a0d-84fc-2f303dd6f0f6/31676778063.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/180be50f-047c-48dc-9a87-56107d932f0b/48501512052.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/comparatives_of_adjectives_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/bise_sahiwal_admission_form_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65578a02-3671-4449-9886-b9bad053057a/dragon_city_breeding_calculator_legacy_dragon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/996eeb52-310e-4402-b5cc-c858e047d24e/sedigoxemi.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_off0000df9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9C 4924 bytes
SHA-256: 0d2115ac202dbdb6a17ae3fbedf6f4886f56531bff63bac3893abd10c9d61795
font_01_sfnt_off0000f05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05B 11508 bytes
SHA-256: e7ee38c0d1fce556c715db46a4a28dd506d52599103c42ef567b1ecdc6f69017

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