Malicious PDF — malware analysis report

Static analysis result for SHA-256 578310715e005f54…

MALICIOUS

PDF

87.1 KB Created: 2021-01-10 22:43:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8e939b1a2acf804c3a3e5fbb71abf9ca SHA-1: 9e8650e89e664aa9ab60b81b3c07309c43fdf3bd SHA-256: 578310715e005f541824cecb0f51386479f348980e8a74d6ca1dd69a0a1a6c9c
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 ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URIs, with one prominent URL pointing to a domain associated with phishing activity. The presence of external URIs and the ML/ClamAV detections strongly suggest an attempt to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://traffset.ru/wb?keyword=mama%20doreen PDF link annotation
    • https://site-1166618.mozfiles.com/files/1166618/android_10_for_moto_one_power.pdfIn PDF document text
    • https://cdn.sqhk.co/duxajoje/KgcUETp/tonixamipobuwopepipetu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446762/normal_5fa17a3f1a576.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489429/normal_5ff0be60c0104.pdfIn PDF document text
    • https://site-1168374.mozfiles.com/files/1168374/hd_wallpapers_1080p_for_pc_windows_7_download.pdfIn PDF document text
    • https://site-1212500.mozfiles.com/files/1212500/35474865270.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/Us5rFjd/73589742262.pdfIn PDF document text
    • https://site-1168326.mozfiles.com/files/1168326/hay_day_game_online_free_download_for_pc.pdfIn PDF document text
    • https://site-1168360.mozfiles.com/files/1168360/zombie_tower_defense_games_hacked.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/suxugipipolazog/sigip.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/rukiladolafusared.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/wobokezuk.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE20 5372 bytes
SHA-256: 53f7b66a3ab2ae7afff0c4e58088cf9e6b74e31018c8fa721f132ba1100b66a1
font_01_sfnt_off0000e062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE062 13156 bytes
SHA-256: 4b2e53e67c03e097138c21f4cee657506f7b08881c9c2beb13b0e6d4ce0863c7
font_02_sfnt_off0001066b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066B 10980 bytes
SHA-256: 49eec7e6e1f6442099c52c31356c2063bc1cd0cc9c424b733c23ee4b08371455
font_03_sfnt_off00012bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEE 17880 bytes
SHA-256: 465e9ee25da50543fcdf53e4aed0a81f61e2b2ab4794df74340cf2df2340e322
font_04_sfnt_off00014728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14728 1736 bytes
SHA-256: 1648accd5638f26481c437d0e436fdfb03edab78dab75f4e73239278c8cddc19

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