Malicious PDF — malware analysis report

Static analysis result for SHA-256 d560f854f743423b…

MALICIOUS

PDF

79.8 KB Created: 2021-03-19 10:02:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bcf3788f487c0f43496be8c7a6747f5b SHA-1: 539d1e3b2692b8c09249f93053d122cfd36e4f51 SHA-256: d560f854f743423b5164176172d5be5389afbd34de493eec981adbb61af118c8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gimoguvi.ru/award?keyword=pdf+to+audio+converter+app PDF link annotation
    • https://rominekajamarol.weebly.com/uploads/1/3/4/0/134040464/zajedixudakijir.pdfIn PDF document text
    • http://jidudilubad.mygamesonline.org/aldehidos_y_cetonas_quimica_organica.pdfIn PDF document text
    • https://bukiwajomudaf.weebly.com/uploads/1/3/4/4/134437050/kaxafudiwuvipikolora.pdfIn PDF document text
    • http://miromawetibikew.mywebcommunity.org/does_youtube_pay_for_live_streaming.pdfIn PDF document text
    • http://posiximuteg.sportsontheweb.net/nipawunubuwuwekiwakizo.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/dabivozapet.pdfIn PDF document text
    • http://jerabigemoz.sportsontheweb.net/area_of_circle_questions.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/muscle_growth_workout.pdfIn PDF document text
    • http://pasipodo.mypressonline.com/58108733557.pdfIn PDF document text
    • http://kafalukuwemi.mygamesonline.org/26547672939.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a4ac6f64-93df-4f29-8490-7a7aede233d1/xurifulitiz.pdfIn PDF document text
    • http://mowigefugitixa.epizy.com/webelo_arrow_of_light_requirements_2018.pdfIn PDF document text
    • http://gizixaxeviduf.myartsonline.com/skyrim_mod_vampire_armor_retexture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/547f6855-15e7-476c-b063-af43f5ffd6df/zidevidoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e0cd808-4308-44d1-9737-83c65f581029/88138684894.pdfIn PDF document text
    • http://padanejelupe.rf.gd/93884576693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b2f94f0-229e-400d-80f7-ff3027dcbdab/goxax.pdfIn PDF document text
    • http://mubapumasas.epizy.com/laxuxibi.pdfIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/blank_outline_map_of_the_world_to_print.pdfIn PDF document text
    • http://wufagezigedo.onlinewebshop.net/44550657025.pdfIn PDF document text
    • http://mokimonanogi.rf.gd/mr_brahmachari_movie_songs_free.pdfIn PDF document text
    • http://ketened.rf.gd/12546482452.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB5 4884 bytes
SHA-256: 92db87fcb4705ba115dcca4fb42caa5ba9b2fb242f5fad58ad65da90da2c1a34
font_01_sfnt_off0000fd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5C 11200 bytes
SHA-256: 0c555d4e1bb195e52a3b41fee9f0cbd9d328dd489605a1244907a5868d4291ef
font_02_sfnt_off0001237d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c