Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaeb40133957cdfb…

MALICIOUS

PDF

62.5 KB Created: 2020-11-17 09:44:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 097dd9b3fc3f0cef03c95130952fdef0 SHA-1: 764bf7c00c88b41baa01793f2689886ca676d418 SHA-256: aaeb40133957cdfb373f0f02d837f3b159a7ad86403c98c0cf8a74142df5cf4d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a PDF redirector and a phishing trojan. It contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. The presence of a large link farm suggests an attempt to generate traffic or distribute malicious content.

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=pilates+power+gym In PDF document text
    • https://godadonalizubo.weebly.com/uploads/1/3/1/4/131437317/668151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5fac08422363a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386837/normal_5f8faa7ab72bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388046/normal_5f932a44f4129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419236/normal_5f98530a3d363.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459468/normal_5faaa6563d4f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408865/normal_5fb3203c2600c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f86fed8185d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384632/normal_5f9b70b14e3d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460232/normal_5fb37f436c07d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409405/normal_5f9babc8e9e92.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/kagedatabujo/illinois_secretary_of_state_hours_call.pdfIn PDF document text
    • https://s3.amazonaws.com/xatojem/instruction_manual_for_fitbit_inspire_hr.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/ethical_considerations_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/banijugoniragom/67860970180.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_off0000b7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B9 5332 bytes
SHA-256: ca6d456f3558eb5acfde7de53b0920f99b5878d084c39194ef93000bf3c84f82
font_01_sfnt_off0000c9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DD 10108 bytes
SHA-256: afdced18415b535b604cb1eb99c4b3fe06201e7f862dc88e4a411af10ef6bf57

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