Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e037449ce9092c…

MALICIOUS

PDF

68.2 KB Created: 2021-01-02 17:42:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d225f83e03e80b381d0db4ded6fcc7fb SHA-1: bb743f8d826b211e81a121e6d254051685a08fe4 SHA-256: c3e037449ce9092c6ddef26f56f04fcc34792782b25b482f517e987398577ea2
184 Risk Score

Malware Insights

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

This PDF file contains multiple embedded URLs, with at least one identified as a malicious redirector. The heuristic firings indicate it's designed to link to potentially harmful content, likely for phishing or malware distribution. The ML classifier strongly flags this PDF as malicious, and ClamAV also detects it as a phishing trojan.

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
  • 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 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.
  • 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://traffmen.ru/123?utm_term=piranha+strike+feat+pathfinder In PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/mojovimifa-menafuwim-xotedunute.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/ayFbiju/baby_alive_grow_up_doll_accessories.pdfIn PDF document text
    • https://fibunijir.weebly.com/uploads/1/3/0/7/130740490/dipubebekami_sidaligijod_fuzupeb.pdfIn PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/laxag_zipomukoku_zizomet_birojuxuviz.pdfIn PDF document text
    • https://tifimiwarefimi.weebly.com/uploads/1/3/4/8/134895051/ripaxijuladi-terijemom-dopijijovexa.pdfIn PDF document text
    • https://segugunopat.weebly.com/uploads/1/3/1/3/131381921/8230272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464065/normal_5fb87f73863d6.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/batinamij.pdfIn PDF document text
    • https://nogiwesetegi.weebly.com/uploads/1/3/1/6/131637024/fotedumijoko_sugexufeza_fotuduto_xesezej.pdfIn PDF document text
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/babisogof-zewewozapezufa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373240/normal_5f9f29fd39d44.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/dRTihgh/fowitojugusogidenafili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380881/normal_5f94f66d60cbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374519/normal_5f89992d91001.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/47409ec1-ef9e-4d1c-968a-9fabb99b520e/divinity_2_secrets_of_the_dwarves.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91ab5d02-8cae-4b13-8ac0-f29b101947d7/62024572519.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_off0000cefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFD 5164 bytes
SHA-256: 5bd3e32353b8b1e2986c92e1e846ac0e2d17266c050a047b2380391efd13b028
font_01_sfnt_off0000e083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE083 10340 bytes
SHA-256: 44e5f501de83784b2c0af740a2115b1eac2bb5461129d60335e482596cd2e130

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