Malicious PDF — malware analysis report

Static analysis result for SHA-256 c071447842616e1f…

MALICIOUS

PDF

76.7 KB Created: 2021-01-20 22:31:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 34c58bec4d3dfac08a334b2c41dffb73 SHA-1: 9036565fa68e786be7a03b52933827585f84e112 SHA-256: c071447842616e1ff2589e89e6acee9e69530723cd70f090d7b9fdd833fdca29
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or redirect users to phishing sites. The document body, though heavily corrupted, appears to be a lure related to weather forecasts, which is a common tactic for social engineering.

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://traffnew.ru/123?utm_term=utah+county+weather+10-day+forecast PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413838/normal_5fdd389f95f6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380072/normal_5fda4b4ca3bcb.pdfIn PDF document text
    • https://site-1175927.mozfiles.com/files/1175927/spades_royale_gameskip_cheats.pdfIn PDF document text
    • https://keromarire.weebly.com/uploads/1/3/0/8/130873863/wubenejavaj.pdfIn PDF document text
    • https://situtewazugigev.weebly.com/uploads/1/3/4/2/134265876/866ce90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5fa32927c711a.pdfIn PDF document text
    • https://wezisewego.weebly.com/uploads/1/3/5/3/135342704/sekedafaxu-pumapesudotar-lakir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408875/normal_5fd94c18acd8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457876/normal_5fcebea790827.pdfIn PDF document text
    • https://site-1221861.mozfiles.com/files/1221861/car_parking_2_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464720/normal_6004e6e5d64a2.pdfIn PDF document text
    • https://razomidubijime.weebly.com/uploads/1/3/4/3/134395635/01a3dda426d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485927/normal_5ff3dca4bf081.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wepaxilex.epizy.com/aparichita_kannada_movie_free.pdfIn PDF document text
    • http://nabunuwo.epizy.com/8915638266.pdfIn PDF document text
    • http://mavusovemoritev.rf.gd/sepaxuwunadikiramixaxiga.pdfIn PDF document text
    • http://koxaxinum.epizy.com/alcatel_7750_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FB 5324 bytes
SHA-256: c31c72a5dfd5c41c41cb0910d9a694a5c97bfb331c0853d907e40b4b1e9b8a0d
font_01_sfnt_off0000f324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF324 10680 bytes
SHA-256: b74479832cdd7e8e103567bdcba64984158467850626708283098df7e463c225
font_02_sfnt_off0001173c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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