Malicious PDF — malware analysis report

Static analysis result for SHA-256 161e11cc1e5fb77b…

MALICIOUS

PDF

57.5 KB Created: 2020-12-14 22:17:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ea5b5d4c15a49b9cef5559a4b411ff32 SHA-1: 752c33dfc7f1de640785e9d3e5f54dc3a21e5b9e SHA-256: 161e11cc1e5fb77bafa3fea5f1c8b1bd967433b07474279faa22d1156d2731f0
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by multiple heuristics and an ML classifier, indicating a phishing attempt. It contains a mass of external links, with the primary suspicious URL being https://traffset.ru/aws?utm_term=amazon+fire+tv+box+manual, disguised as a manual. The document body is heavily obfuscated, preventing a clear understanding of its direct intent beyond the link farm, but the overall pattern suggests a lure to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/aws?utm_term=amazon+fire+tv+box+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417206/normal_5f961f4b9edb6.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/miwuvozililer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392862/normal_5f9402bf90f1b.pdfIn PDF document text
    • https://gimitowogavu.weebly.com/uploads/1/3/4/7/134746983/60a56997b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc7abfeaa0dc1643a32d97c/t/5fc99da5887b444c61509094/1607048614023/mobile_gamepad_for_sony_android_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/biodiversity_threats_and_conservation.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/51339609921.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/benzodiazepine_withdrawal_protocol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc505c01c8c7413144c6c55/t/5fc5594c9d793648403fb0f3/1606768972970/47561189861.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1231803f460880cbb032/1606226482947/51938221636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f2ecaeb-3abe-4735-835d-f7dc90e9fe4e/sanwali_saloni_teri_mp3_song_downloa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06b148139af037642cc0d/t/5fc337659d79364840f658d8/1606629225290/skim_jillian_tamaki.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_off0000aa08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA08 5040 bytes
SHA-256: 73afb63181fcd1aa0288578de3307f7fdf5bb31de7d5020c2da72b5411808533
font_01_sfnt_off0000bb29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB29 9036 bytes
SHA-256: 56264863a70a427f0fe43bb1156a6e263799bca4f6cff53164a69ccf316e2900

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