Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a9e2c6dadbe4be…

MALICIOUS

PDF

82.9 KB Created: 2020-12-26 01:45:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 48c2571485443cbe71bdf97c81c30660 SHA-1: 52a09e7c77f7c591dbe89b4206a433061321d3e4 SHA-256: 72a9e2c6dadbe4be3cf9c32f57a453b566b98fad41a6adede6bc30cdf49044e0
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a primary URL pointing to a site offering a 'free download'. This, combined with ClamAV detection and ML classification, strongly suggests a phishing or malware distribution attempt. The PDF structure and embedded links indicate a tactic to drive traffic to a malicious domain, likely for initial compromise.

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://trafffi.ru/strik?utm_term=night+on+earth+free+download PDF link annotation
    • https://cdn.sqhk.co/wetotuluxe/21hghLN/to_do_list_goal_planner_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fewisezux/4QjdjcJ/solar_system_planets_line_drawing.pdfIn PDF document text
    • https://vukegodepobaxi.weebly.com/uploads/1/3/4/6/134676750/foviz.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/pasenid.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/Qibjcgf/jesevodofajovazudafogaxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vawoginele/takosiropevetirepolakaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7cd7772-2188-48c3-a6a0-278d7250404e/culpeper_county_schools.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f01c96b3-dc8a-4d17-a18f-c49b73f86542/15877107131.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/67858476428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07721c4f-4388-4a76-97e0-a5478115ea79/2870472405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af36f1a0-e2d9-44fa-8cc2-b4c4bbcf71cb/grignard_reagent_mechanism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0693b87e-1b51-4b2c-8bdf-dd5d3d91637b/puwigarivolip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3a3ab3a-3dc9-4973-bd4c-574869111e8d/70685024822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/364ec0d3-dbfe-4a4c-86e0-4c532fdf925f/european_buying_office.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_off00010843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10843 5052 bytes
SHA-256: a2820996c5216315dba829e788304d898a52582461cf8972ed1afe959580cd3f
font_01_sfnt_off00011986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11986 10848 bytes
SHA-256: b9299fd81e3ae1254ddf54691983b187cf15dad48f8829f6f66918bd290acc78

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