Malicious PDF — malware analysis report

Static analysis result for SHA-256 3035a34aee278a3e…

MALICIOUS

PDF

73.3 KB Created: 2021-03-06 12:02:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 16989052c0dc070313667b97a6b9a92e SHA-1: 7cd43467bceb0d1173a7d9cde7b97d7c380c0827 SHA-256: 3035a34aee278a3eaff44853fe060740a7b9e25c8a39a1485c432e4f79e7885c
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, contains keywords related to quizzes, which likely serves as a lure to encourage clicks on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/award?keyword=harry+potter+quizzes+hardest PDF link annotation
    • https://cdn.sqhk.co/jiwosowo/fjf5hdo/download_game_zombie_outbreak_shooter.pdfIn PDF document text
    • https://muzekulukusutaw.weebly.com/uploads/1/3/5/2/135296419/2928012.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/hahcheq/sunisizilopuraw.pdfIn PDF document text
    • https://ladetizor.weebly.com/uploads/1/3/4/7/134731735/f4f5bd7.pdfIn PDF document text
    • https://lofefogurabu.weebly.com/uploads/1/3/1/1/131164054/wisepogiled.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/ifSZ8gg/lowe_s_hours_today.pdfIn PDF document text
    • https://biteledazuxol.weebly.com/uploads/1/3/4/3/134315761/dbeb78462464.pdfIn PDF document text
    • https://cdn.sqhk.co/lajoroteb/igjjhgf/world_s_astonishing_places.pdfIn PDF document text
    • https://zozolunefa.weebly.com/uploads/1/3/5/3/135325744/2de1567f35ca3b5.pdfIn PDF document text
    • https://xoxomedeze.weebly.com/uploads/1/3/5/3/135308121/5266432.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/1Igc3mg/96208462364.pdfIn PDF document text
    • https://fulojozizarotuv.weebly.com/uploads/1/3/4/3/134318677/golurix-derad.pdfIn PDF document text
    • https://cdn.sqhk.co/busosuwik/eibwihf/video_gif_memes_pro_mod.pdfIn PDF document text
    • https://kogusixotitijib.weebly.com/uploads/1/3/4/6/134692341/8c3db8f918f7487.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/eaPggkE/33908154611.pdfIn PDF document text
    • https://toroborelap.weebly.com/uploads/1/3/4/8/134867907/6711b5.pdfIn PDF document text
    • https://cdn.sqhk.co/rasetiwulipu/MQZjhhh/61859616175.pdfIn PDF document text
    • https://cdn.sqhk.co/supetuzitepi/cCjijeU/mamujanuvigiwakuna.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cab0ec41-5fe2-47fe-89fc-e4190ac4200b/how_to_pair_bluetooth_soundbar_to_samsung_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96886bb4-6525-495e-9683-6b2f637c8e62/a_link_to_the_past_heart_pieces_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea21a897-27c7-48d4-a865-4dd7e135edb1/tenibavowoparev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d7664ce-9273-4b07-983c-60d57da3ae8b/1999_evinrude_9.9_4_stroke_weight.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_off0000e22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22B 5252 bytes
SHA-256: 631796bb0b4f98f8f0e348f6310f77f52ac8af58d0a16974049876775ebaaf66
font_01_sfnt_off0000f40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40F 10548 bytes
SHA-256: 9779e3fc74cddddbef7d12e089de97c9bcb46387b8aa84c1cb6709073e679be6