Malicious PDF — malware analysis report

Static analysis result for SHA-256 4624aedea1f04b5f…

MALICIOUS

PDF

76.3 KB Created: 2021-01-10 00:39:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e00ba294be23b63c25949721a272ff57 SHA-1: 81251d7ec8730c36bff7f0acce8d8e8fe8ff95cf SHA-256: 4624aedea1f04b5fb04a0fbe5385a541347f23f04896eab2ac4776b6cf40cb5f
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to link farms on disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a URL that appears to be a tracking parameter, reinforcing the phishing lure.

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/aws?utm_term=genius+hour+research+template PDF link annotation
    • https://site-1179856.mozfiles.com/files/1179856/lezusapuzulawimijubesaz.pdfIn PDF document text
    • https://cdn.sqhk.co/dawupana/gdggxuL/zombie_apocalypse_full_movie_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/hd0CGs1/suxawiwij.pdfIn PDF document text
    • https://cdn.sqhk.co/pemejurove/riegcg4/watch_the_office_parkour_episode.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_5f9bdd9096aad.pdfIn PDF document text
    • https://site-1175775.mozfiles.com/files/1175775/26544243875.pdfIn PDF document text
    • https://site-1176532.mozfiles.com/files/1176532/sakivemusobuzabexalimajup.pdfIn PDF document text
    • https://cdn.sqhk.co/dazibewibu/dWhbhh6/best_rock_radio_stations_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/pemazekefise/CphfswA/octopus_tattoo_meaning_pictures.pdfIn PDF document text
    • https://site-1176393.mozfiles.com/files/1176393/w3schools_javascript_tutorial.pdfIn PDF document text
    • https://site-1173562.mozfiles.com/files/1173562/v_moda_headphones_crossfade_m-_100.pdfIn PDF document text
    • https://site-1168215.mozfiles.com/files/1168215/kapofita.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/pevuwarobuvowa/wudonolixezajibekewamet.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/42913509040.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_off0000ee17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE17 5204 bytes
SHA-256: 5cc31c37de92d254edf099939ab64e5e3fc05ae8c058f85350f98013fb3565b0
font_01_sfnt_off0000ff9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9E 10892 bytes
SHA-256: dd6ae973806f2620888288dd94cfd0038ee6b486d1833f98c1fdbc0f6e307e9d

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