Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f275657d95df81e…

MALICIOUS

PDF

90.4 KB Created: 2020-12-21 06:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 67ecbc5ecd1eade73fcdc8875eadb299 SHA-1: cf4ef680be7ac6151e2549013dc73ff13b37de33 SHA-256: 3f275657d95df81ef0602219b0fe9431cff00854f3b49ee1f4a10068e5c70632
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a significant number of embedded links, many of which point to external PDF files hosted on various platforms. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain metadata related to academic submissions and pharmacy, suggesting a lure for phishing or to drive traffic to malicious sites. No scripts were extracted, but the primary attack pattern involves redirecting users to potentially harmful URLs.

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
  • 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.
  • 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.
  • 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/123?utm_term=apha+2016+abstract+submission+2020+pharmacy In PDF document text
    • https://vomedizi.weebly.com/uploads/1/3/5/3/135312409/1088318.pdfIn PDF document text
    • https://tasototunone.weebly.com/uploads/1/3/4/7/134755659/sutinon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5fab5a880eb32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383680/normal_5f8f1635c56ac.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/kulozitux-nizogene-jokurekilujex.pdfIn PDF document text
    • https://raxabebawozovi.weebly.com/uploads/1/3/4/3/134311701/9591580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389568/normal_5f95560c5c443.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/0275e33b-a22d-4403-b3b3-a19d81cd7f7a/gasorevikevomoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fd4de53-0c56-4dbf-9652-fce95c6acb5d/wild_things_pool_scene_time_in_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/12th_half_yearly_answer_key_2018_maths.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56b053bb-ba38-4138-9050-cf3660b12dce/83030228972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71432959-f8bc-4fe9-a8af-14df8396fb54/rack_of_pork_smoked.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 8

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_off00011f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F81 5852 bytes
SHA-256: 9b922c15eb2d8e59b38a6d480c7dbeed41e93284ce77045fde3094a79a2b4cf2
font_01_sfnt_off0001334a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334A 13744 bytes
SHA-256: 87f875964cbc8580ddb47b0d6c92814f782b558f8cb1698b854829804aff3290

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