Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf21e362c43379c…

MALICIOUS

PDF

78.5 KB Created: 2020-11-27 12:01:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1119f77457ce33c3e868313269bdd718 SHA-1: 1d5e057f1ed0ac2045b42dc62192fca05c959e97 SHA-256: daf21e362c43379c09743ba08047dc74b38cace52b6a01294d40eb20a409e216
184 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a critical heuristic indicating a redirector link to known malicious infrastructure. The ML classifier also flagged the PDF as malicious. While no scripts were extracted, the presence of numerous links, including one pointing to 'traffmen.ru', strongly suggests a phishing or redirection attempt to lure users to malicious sites.

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/aws?utm_term=the+history+of+indian+english+literature+pdf In PDF document text
    • https://lezuzanufebaj.weebly.com/uploads/1/3/4/8/134873312/wuzizurunik.pdfIn PDF document text
    • https://pepusaneped.weebly.com/uploads/1/3/4/5/134503703/resodetenofujafijupu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405638/normal_5fac015a5648b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454171/normal_5fa7b2e6452b0.pdfIn PDF document text
    • https://xetutinafo.weebly.com/uploads/1/3/0/7/130775845/vagaritisimuwubono.pdfIn PDF document text
    • https://fegilekupajot.weebly.com/uploads/1/3/4/4/134404616/naxeduvazewixux_lanupokiw_buwevitiwo_viwozajumo.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/8346057.pdfIn PDF document text
    • https://dedetalorisa.weebly.com/uploads/1/3/4/5/134593476/4067625.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/mesixadelomomo/nervous_system_word_search_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75e5d9be-0c5f-4f31-bf2e-ff2306c233ba/magazin_play_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d1d0b71-8267-4f7d-848d-44a1e5010615/bruce_robinson_withnail_and_i_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd6ff654-1190-4d07-904a-461678a782c2/89114282736.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50934a02-7ae7-49fa-8371-ea4b9c17d293/mijamijob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad6ed081-6b7b-4f43-b6d4-74b559ee50d5/tukogixaperozubokufuxexos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/877909dc-db51-4a6e-8386-4f71bf839b76/gowolusuzifijol.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_off0000f4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 5356 bytes
SHA-256: 0ebc49960496f416725f249bf4a22d3b4dcf93e3c98d8f8b28893e13304aea7d
font_01_sfnt_off00010701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10701 11652 bytes
SHA-256: a56c85de1a00c829e0e1203bceafc2ba31f7b11f2ea962731d88cb851661d009

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