Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec60f3aa35ad5a1c…

MALICIOUS

PDF

82.7 KB Created: 2021-03-16 00:11:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 227d3452fda6e1c6a052e452f176c12d SHA-1: cf018b59b82c422c9c0463608dc44d65c97a51c8 SHA-256: ec60f3aa35ad5a1cbb3405011f45730912fa0c685e0971820f736329b13d40bb
186 Risk Score

Malware Insights

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

This PDF document 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 hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary URL observed is https://mezovuduw.ru/wix?keyword=insignia+air+fryer+reviews, which likely serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://mezovuduw.ru/wix?keyword=insignia+air+fryer+reviews PDF link annotation
    • http://zumewidife.mygamesonline.org/conference_room_booking_system_outlook.pdfIn PDF document text
    • https://tedawubav.weebly.com/uploads/1/3/4/3/134376018/geguzapapul.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/gepurewozudojof_romez_pijegi_wolidemikoba.pdfIn PDF document text
    • https://nuvawusop.weebly.com/uploads/1/3/5/3/135302159/jupurig.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/donudixibiti.pdfIn PDF document text
    • https://wegenagozej.weebly.com/uploads/1/3/5/3/135394478/3092583.pdfIn PDF document text
    • https://bemetezebore.weebly.com/uploads/1/3/4/8/134882820/8041133.pdfIn PDF document text
    • http://trysol.xyz/wordpress_google_maps_api_key_errory7mpo.pdfIn PDF document text
    • http://1freedom.space/faderelur5t.pdfIn PDF document text
    • http://pmaider.com/lemon_crinkle_cookies_with_lemon_frostinggcqfs.pdfIn PDF document text
    • https://wilowukodol.weebly.com/uploads/1/3/4/8/134881933/5433dd64.pdfIn PDF document text
    • https://divekoworubu.weebly.com/uploads/1/3/4/0/134017674/ropoxejirixu.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/9a0b5531-42d9-42f2-818f-dc8cb6afa0c7/amplificador_de_audio_para_casa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbdd2822-3c8f-46dc-a451-41f83a2d8f82/2010_dodge_caliber_dash_light_meanings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/438555af-69bb-49c7-8420-9d466fb25b68/najozijab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d55ceef-8ac3-481f-95b5-465ea8041509/kopilokiwededogerigiwin.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/akkada_vunnavadu_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a90361bc-9a1b-4904-a901-351673c51a24/gusefipev.pdfIn PDF document text
    • http://mugazukadum.onlinewebshop.net/alto_shaam_oven_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/zulesiveridufididibubeki.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_off000105a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A4 5096 bytes
SHA-256: 61012ad83db39e96d912eedc40ac705ad077946dcc1abc9c27c935780817d7b3
font_01_sfnt_off00011725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11725 11440 bytes
SHA-256: ec45af47f8f46719c9f92db85fd5613d15c8e9bd3aa876cf26b3840424f3a1cd

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