Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a0417397917cacd…

MALICIOUS

PDF

79.8 KB Created: 2021-01-01 10:57:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e037fca3b44d65c10c3f25a64f7d444 SHA-1: 61627648b33c6ca8d7fd3cbf4928aad59619cbac SHA-256: 1a0417397917cacd09c3d5549a4d8ab56644a3650ad64825d559d1fa7be32f12
126 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or download further malicious content. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a phishing lure.

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/123?utm_term=prismacolor+pencils+chart
    • https://cdn-cms.f-static.net/uploads/4423430/normal_5fb9266b89d1e.pdf
    • https://gumopaxegekugod.weebly.com/uploads/1/3/4/0/134018731/7f195eae89.pdf
    • https://cdn.sqhk.co/zenetofuma/eGjgOhc/vutajazusoranam.pdf
    • https://lukavorewigi.weebly.com/uploads/1/3/4/8/134862497/601c25f.pdf
    • https://sujexixapobitu.weebly.com/uploads/1/3/4/3/134328704/sixalorov.pdf
    • https://kezozebajex.weebly.com/uploads/1/3/4/2/134265808/40931a98cc77d.pdf
    • https://cdn.sqhk.co/ditetona/gidTEid/cricket_live_match_app.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/2f6ac436-b48e-4aa4-9fa3-a846703eaf15/arts_in_the_park_manhattan_ks.pdf
    • https://uploads.strikinglycdn.com/files/523ea12c-c803-4322-8518-d25151122d1d/maroon_5_songs_youtube.pdf
    • https://s3.amazonaws.com/fejififimaketo/bike_games_unblocked.pdf
    • https://uploads.strikinglycdn.com/files/8c5fc7b5-8539-4c30-a106-4e3ca78cd7c6/john_deere_544e_parts_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef1f.bin
c3dca7f81d76970ea566ae6d1a1d0554dd0edbfb908ad7f841bab6766cb6604e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1F 4964 bytes
font_01_sfnt_off0000ffb3.bin
b3e4ab99679eec94812422fc980a4d2e2415204ede44b1e7dc143e8e73e1025b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB3 10420 bytes
font_02_sfnt_off000122d8.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122D8 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.