Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae93587963601ce…

MALICIOUS

PDF

82.7 KB Created: 2021-01-08 05:41:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ac41e7864dd62aa28241bd0ba2ec0054 SHA-1: c973c65b2a7761e04d176760af8d1a05317a963d SHA-256: cae93587963601ceed6bdbc811af3f60a0b528c521ef7aa2599001fbf2a4b86e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains numerous embedded links, with at least one pointing to a suspicious domain ('trafftec.ru') and others hosted on disposable domains, indicating a likely phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

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
  • 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://trafftec.ru/123?utm_term=does+heat+expand+or+contract+metal PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454543/normal_5fc6b83366e26.pdfIn PDF document text
    • https://pozanabuloga.weebly.com/uploads/1/3/4/3/134366917/ab28479e69cd0.pdfIn PDF document text
    • https://zibabesisem.weebly.com/uploads/1/3/4/6/134670176/jozosivujolirazew.pdfIn PDF document text
    • https://gililizu.weebly.com/uploads/1/3/4/7/134770310/kekizud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f87820a2f5f0.pdfIn PDF document text
    • https://cdn.sqhk.co/vipabure/herjjdf/glitch_video_effects_unlocked_apk.pdfIn PDF document text
    • https://dixamagajo.weebly.com/uploads/1/3/4/6/134652312/a73c7b32b7f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393628/normal_5f948d5fd590a.pdfIn PDF document text
    • https://zagamujibagixon.weebly.com/uploads/1/3/5/3/135326067/goguvivu_sizedewodem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503197/normal_5fbe1605dbce9.pdfIn PDF document text
    • https://jikowizovogowo.weebly.com/uploads/1/3/2/6/132682153/ladevojevenuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477637/normal_5fda74cb59ba1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379960/normal_5fdba8c9be39b.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/x7JVTij/hovercraft_getaway_mod_apk_1._1._4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463812/normal_5fba30f1226ed.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/9779ff3f-073d-40fa-8847-7ee11e254bdf/quadratic_function_in_standard_form_converter.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_off00010367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10367 5380 bytes
SHA-256: 558a26831dde2755ac9d9276761522145dbc038eb3c01c3b599debac54a433b0
font_01_sfnt_off0001158d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158D 11324 bytes
SHA-256: b6a575e719e1ea09d99ead556c39e90cd376651c8c7e9559025ef49f6f0469e8

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