Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d7939da5283f1c9…

MALICIOUS

PDF

71.1 KB Created: 2021-01-28 17:51:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f5d9f129f4b2781d6c5f0e813643dd2f SHA-1: ed26874ac2a6b41c9e1e5b9f98bd6b2d47c1417c SHA-256: 2d7939da5283f1c98555a42bae9352380f7afb62362cd14b5ae19a84adb2ac60
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains embedded URLs pointing to suspicious domains, likely intended to redirect users to malicious content or download further malware. The document body, though heavily obfuscated, contains keywords related to software, suggesting a lure for software-related scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wb?keyword=voxal%20voice%20changer%20key PDF link annotation
    • http://mrt-64.ru/does_exocytosis_use_active_or_passive_transporti6q6g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451932/normal_5fe34f4905199.pdfIn PDF document text
    • http://devlp.design/56034887491vqhug.pdfIn PDF document text
    • https://ponebivilu.weebly.com/uploads/1/3/4/5/134505494/bepafibodumuba.pdfIn PDF document text
    • https://webuwexuzebonal.weebly.com/uploads/1/3/0/7/130775053/depamamakosopesa.pdfIn PDF document text
    • http://50offshop.info/dodgers_last_world_serieshf6jv.pdfIn PDF document text
    • http://reawolt.online/random_name_generator_fantasy_cityp3zj2.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/gfUQi9G/big_buck_hunter_monitor.pdfIn PDF document text
    • https://jitedamanun.weebly.com/uploads/1/3/4/6/134627504/71085c.pdfIn PDF document text
    • http://trudogoliya.online/85585361f1bj3.pdfIn PDF document text
    • https://lurexiji.weebly.com/uploads/1/3/4/5/134594132/379936e35d2ae91.pdfIn PDF document text
    • http://mishabelle.ru/391040760548n7be.pdfIn PDF document text
    • https://xazepobuzu.weebly.com/uploads/1/3/4/5/134582826/lufugototowi-newuri-kifebunomotin-bazuve.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/sesafefanulokam/futuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/96452053080.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/mejogakirabokeguxaj.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_off0000da4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4C 5144 bytes
SHA-256: d83ac81476f1a5fbdfc1fe999d327e75767d3c6185ced1b1a509ec9067fade28
font_01_sfnt_off0000ebd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD9 10608 bytes
SHA-256: db45f4b83c88678a59ce363aefcb610b5907bd34afee4a7e035fb70e6fdd10a0

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