Malicious PDF — malware analysis report

Static analysis result for SHA-256 48291ccf5dea9a24…

MALICIOUS

PDF

78.5 KB Created: 2021-01-25 19:59:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: fb2aad04d4e694f3b8c941160684a319 SHA-1: e39a5e2e4fedb6661e13edf49bc560c184858033 SHA-256: 48291ccf5dea9a24f561211f83db6950ce15133c95429cc365d5b86db6a5c2c0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated a high probability of maliciousness. Numerous external URLs are embedded within the document, suggesting a phishing or malware distribution attempt. The presence of multiple disposable hosting links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/123?utm_term=fats+chemistry+and+identification+lab+answers PDF link annotation
    • http://helplnstagramcontact6088756.com/86215119356e8o41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383930/normal_600ea3fba1c0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496818/normal_5fe8b82279ef4.pdfIn PDF document text
    • http://center-san.ru/f1_2016_ps4_2_player_offlineyy0im.pdfIn PDF document text
    • http://justiciaforjustice.com/52788835852j5obu.pdfIn PDF document text
    • https://wugepugozufov.weebly.com/uploads/1/3/4/7/134744675/2479456.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/igchgjc/72698795839.pdfIn PDF document text
    • https://tabuwesajusa.weebly.com/uploads/1/3/1/8/131856124/mujep.pdfIn PDF document text
    • http://effektzhizni.ru/sport_racing_apk_modme3xo.pdfIn PDF document text
    • http://instapresent.site/manual_cnc_simulator_espanol8lm8k.pdfIn PDF document text
    • http://telemprom.xyz/58731853829kr7fc.pdfIn PDF document text
    • http://tomandbxof.site/48184007871y11xa.pdfIn PDF document text
    • http://dle-tpl.site/1150812406s1jb1.pdfIn PDF document text
    • https://cdn.sqhk.co/sebidurubuze/iKhaDha/80s_music_trivia_multiple_choice_with_answers.pdfIn PDF document text
    • http://aov.one/vintage_motorcycles_hd_wallpapers7sn9j.pdfIn PDF document text
    • http://accface.in/this_means_war_gospel_song_lyricsogma4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00B 5552 bytes
SHA-256: 393a440794edee18606f081cb94511f7cf14a3ac27857724344e88a07dc6490c
font_01_sfnt_off0000f2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D4 10728 bytes
SHA-256: 839773b7eeea4ec6faf45939591c19d3bfd360b91183480deaae30ecaeb7ca05
font_02_sfnt_off000117a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A8 16148 bytes
SHA-256: aabbb95e4258a1bccfe6759090a0a8b97a33e8154131110566ffb2eaa8fdb080

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