Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e7d3a326e3ecca…

MALICIOUS

PDF

77.2 KB Created: 2021-03-23 17:07:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f9d11f790941268c1554951998774f16 SHA-1: 5f20cc5064c6d3ceb46bfdabc20b0f74daa6d752 SHA-256: 13e7d3a326e3ecca29ada5e45e5800334c60e9502667b248f32cc7345d82feac
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to contain search terms related to popular media, likely as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/123?utm_term=minority+report+movie+on+netflix+canada PDF link annotation
    • http://zoneeuro.pro/779161175927qsv2.pdfIn PDF document text
    • http://help-service-support.com/how_to_make_your_friend_fall_in_love_with_you_wikihow5znr7.pdfIn PDF document text
    • https://sanokigoj.weebly.com/uploads/1/3/4/8/134863934/6152965.pdfIn PDF document text
    • https://cdn.sqhk.co/lukedivibeb/ijbVhdX/57818461916.pdfIn PDF document text
    • https://miravavomi.weebly.com/uploads/1/3/1/4/131410597/xejoxira-wofaju.pdfIn PDF document text
    • http://healthyforczechrepublic.site/valuation_gographie_cm2_se_dplacer639fc.pdfIn PDF document text
    • https://jabenawonidibe.weebly.com/uploads/1/3/5/3/135385032/favupezarekupad_murewiketavi_sekolu.pdfIn PDF document text
    • https://saxipapes.weebly.com/uploads/1/3/0/7/130738636/mubava_tomow.pdfIn PDF document text
    • http://sallehub.xyz/what_does_a_navy_seal_dress_uniform_look_likencrtb.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/2yiehcf/music_70_80_90s.pdfIn PDF document text
    • http://jobauthor.online/senivulawegic66vf.pdfIn PDF document text
    • https://bilezebije.weebly.com/uploads/1/3/4/3/134344171/1528821.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tavubemafixa.rf.gd/vofowodetujuzewamem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c0cd9de-3903-4e7f-9219-675916bbbf3d/71319268969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/305f5684-eb3a-4cb8-9043-3648ab737370/70705851403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29605f23-a8ce-4f1a-bae4-008eadc477a2/red_rising_book_6_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae3322df-4cc5-49ef-878e-963c876eff6d/electrical_lighting_control_symbols.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/662dccad-8180-4a2a-b676-2a59370c7a48/white_christmas_movie_collectibles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe7b47a7-d0f3-46d0-bdf7-6a37d487eb9e/75776230893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16958508-0b7c-4ac2-855a-3bf8869a775c/81466777104.pdfIn PDF document text
    • http://devevemiwu.epizy.com/39062247426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c8d54cc-23d2-45e8-af93-74647fcfece5/how_to_build_muscle_after_40_female.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8fd2ec9-3cf5-4027-8606-bc1d5c28ccc1/the_secret_book_and_scone_society_synopsis.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_off0000f003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF003 5356 bytes
SHA-256: 7159eb61974218c9893b177813ed94e722f799f6a782638fcaea44a0b518efe5
font_01_sfnt_off00010247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10247 11072 bytes
SHA-256: ae0cf14980fa7636b2da8dc001498664f6305fc34b396240011deec927883185