Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7b78e21131dfbe…

MALICIOUS

PDF

72.5 KB Created: 2020-12-26 08:50:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0bfd93ec8a888712bb133b7c2049ff0d SHA-1: 97f7fe0f1706bc4d7512e64ca7afc37a289643dc SHA-256: fa7b78e21131dfbe2e340136b52f8e392d073358e48fd558803a2730401f0a7c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, characteristic of a link farm used for SEO manipulation and potentially phishing or malware distribution. The primary URL, 'https://traffnew.ru/strik?utm_term=download+dragons+rise+of+berk+android+1', suggests a lure related to a game download. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/strik?utm_term=download+dragons+rise+of+berk+android+1 PDF link annotation
    • https://pajenugemin.weebly.com/uploads/1/3/4/6/134677616/xoginudedeku.pdfIn PDF document text
    • https://komamopiragi.weebly.com/uploads/1/3/4/4/134444029/1d1a3e9fed44.pdfIn PDF document text
    • https://sadozilodefizon.weebly.com/uploads/1/3/4/6/134659806/6fc97757b73172.pdfIn PDF document text
    • https://nifogagerosore.weebly.com/uploads/1/3/5/3/135300162/jetefazijoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374682/normal_5f93523ff2025.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/fbde1dcd-349d-4c2e-a24f-22daee2291be/57067386140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1337e874-e375-435a-b48a-17ecf2c0e29f/ionic_vs_covalent_lab_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/endless_space_2_unfallen_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/xaripomaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/749a27b4-cc95-4aa9-83a5-f5c3d2caa237/why_do_dogs_wag_their_tails_when_lying_down.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eb227c8-d608-4865-b43c-6168ef40359a/58215496169.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d52b3404-c9ef-4b66-870f-b2c0a25d7141/jedof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a6c4862-39e6-483a-a05e-58220073169d/el_naco_en_el_pas_de_las_castas_ensayo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3516ca05-d976-4b0d-a8d0-170e39d575e0/85229538243.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_off0000dec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC3 5420 bytes
SHA-256: ae36c75a4fd0d36e1a3e67ed44c579a9d804f5fdf8ca786a639c21aa524fd3f4
font_01_sfnt_off0000f160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF160 10516 bytes
SHA-256: c34ccbbd1667bd349d544c0bc3015065b0ca2571167ddfb7795c01e1d6022aaf

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