Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b323c778df556c…

MALICIOUS

PDF

83.2 KB Created: 2020-11-13 00:50:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ef520a33ee78438df4fc6dcd3915b342 SHA-1: b7b899b7eae9b09b07249d86cd15e409e0af61a4 SHA-256: b7b323c778df556c15fe7843eef31a7f4d343978697214a2233459d0d24da521
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_SEO_LINK_FARM'. The primary URL, 'https://trafftec.ru/strik?utm_term=dnd+hand+of+vecna', suggests a potential phishing or malicious redirection attempt. While no scripts were explicitly extracted, the PDF structure and the high ML confidence score indicate malicious intent, likely related to distributing further malware or phishing content.

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://trafftec.ru/strik?utm_term=dnd+hand+of+vecna PDF link annotation
    • https://palifeselaliku.weebly.com/uploads/1/3/4/4/134441248/3961218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413455/normal_5f999e14bbf2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5f8822d9eae38.pdfIn PDF document text
    • https://pidivupam.weebly.com/uploads/1/3/4/3/134327465/mikuvujemojufezim.pdfIn PDF document text
    • https://wunamixexot.weebly.com/uploads/1/3/4/4/134456109/456845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367642/normal_5fa74c69c8665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_5f88be983e9b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392664/normal_5fa8ddddbce9b.pdfIn PDF document text
    • https://masogipu.weebly.com/uploads/1/3/1/6/131606875/8050757.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401691/normal_5f9dcf9d48596.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/varolexexus/codes_for_pet_ranch_simulator_2_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68176835-287f-46c8-b553-aa472fdc4e6e/55128071699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ace13497-2639-4814-857c-05fc7017c693/58749382415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c6d56b2-83bd-444e-b777-f051af11d105/28999354791.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f95a4d3-f97f-4c5f-b13c-1eae72e23f81/gufopukero.pdfIn PDF document text
    • https://s3.amazonaws.com/mewezekilafef/4554250421.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2A 4524 bytes
SHA-256: 5abefcca6f4ee66fcf828e92877b2efe436c5616d24d1cad8f13741bc14e7ae9
font_01_sfnt_off00010b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B81 11216 bytes
SHA-256: 2fdea1f4a5384a438a35957e0cc48033f66c406d3a7ef6bf4c7b040525ae36ff
font_02_sfnt_off0001319c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1319C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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