Malicious PDF — malware analysis report

Static analysis result for SHA-256 a725b1a16b3bdca8…

MALICIOUS

PDF

63.2 KB Created: 2020-11-17 23:50:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 774faf4d233e412b79538c9625eaa081 SHA-1: d697e39c833e43d266d8d957122005d2c99cf7c7 SHA-256: a725b1a16b3bdca8139e4c363f27cc8272c0714a51570bd476f31031e6fc0e8e
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 numerous external links, with a critical heuristic identifying it as a PDF link farm. One of the primary URLs, traffking.ru, is associated with malicious activity. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and link farm behavior suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/123?utm_term=cannon+gun+safe+academy PDF link annotation
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/d4f71ba7f239.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f91b9835ebb9.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/1bd39804-cb7f-49a9-8891-8251cde4c8ee/84688790265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cedc828-2b53-4d10-99f0-826f714780b7/flame_azalea_poisonous.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52af8118-22df-410f-a4bc-643786af1c94/xikabaxewiwufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/579e08af-0759-46dd-887c-8c30923dce5f/29595979164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03abe7d9-35cf-4288-ac13-9df59cfb8103/49951821384.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/alone_marshmello_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52f092ee-0dc8-46a8-9ea5-be7b0e02af6e/the_legend_of_the_candy_cane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c10f5ae4-9a4a-48d5-b057-34766d237395/xamutunezuxegulegow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7ca810e-2b5c-4374-bc23-50ebd5dbfca8/lalafosude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f0e2d44-c138-49ed-a19c-7f302c061ae9/97900185441.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/aubergine_menu.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 5

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_off0000bb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB20 5220 bytes
SHA-256: 45eb8a8a3a25e3d8e0f7a10c3d99a5cd40df827d4f4a5513720c9d883c3c7b93
font_01_sfnt_off0000cce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE0 10412 bytes
SHA-256: 30af5821e5326c78efb1450b0fc9cd0f1b4e1dafa4e9bfb2425fad77ed316b0c

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