Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ce754ae67de5dd…

MALICIOUS

PDF

82.3 KB Created: 2021-03-27 16:23:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1e0bb661174d634e969b33ac214d65e8 SHA-1: b29f520961ca5321820dc0c24361cb32ccfc641f SHA-256: 05ce754ae67de5ddf549007a260865067cc40b0a98c826a6e318ea62aedeea94
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic flagging it as a link farm on disposable hosting. ClamAV detection and ML classification strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://seumenha.ru/award?keyword=ser+bachiller+pdf+junio+2020 PDF link annotation
    • http://grigolia-studio.ru/xebexaxeti6z5o2.pdfIn PDF document text
    • http://visiblawty.com/91293246816gkcsj.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/utorrent_pro_free_windows_797z2b.pdfIn PDF document text
    • http://walkover.me/pokemon_cloud_white_cheats_100_catch_rateik2sh.pdfIn PDF document text
    • http://opensalon.xyz/zafanikizapofadetujifimgqvgk.pdfIn PDF document text
    • http://oneitstore.pro/pratt_whitney_pt6_maintenance_manual0lo5c.pdfIn PDF document text
    • http://graatorama.fun/77382904415uxn11.pdfIn PDF document text
    • http://golixudib.mypressonline.com/what_makes_a_metaphor_effective.pdfIn PDF document text
    • http://dejivuxa.mygamesonline.org/englander_pellet_stove_manual_55-shp10.pdfIn PDF document text
    • http://lejunuzegakikuv.mypressonline.com/ravoti.pdfIn PDF document text
    • http://daxavepevepa.mypressonline.com/chava_full_book_download.pdfIn PDF document text
    • http://ersoil.fun/vizuzofojamefagugaxoc986r.pdfIn PDF document text
    • http://presente-top.store/what_is_the_message_of_50_shades_of_greylkrrf.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/9f6202f1-7008-4971-83c4-cf3fc570c67a/best_data_science_masters_programs_2020.pdfIn PDF document text
    • https://d920bd67-dfaf-4c99-85b0-fcb8118dfb91.filesusr.com/ugd/383849_0199a17cf99e424fa0b0a8e24d8d0335.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/square_root_of_200_simplest_form.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/subsistence_farming_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/17005013029.pdfIn PDF document text
    • http://suruliloxapesas.myartsonline.com/nirob.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/bose_soundbar_universal_remote_codes.pdfIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_c88cf9b423044bfaa5a825eb96b9dba7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3740558-a326-4367-852e-3d9c146dceed/how_to_connect_microsoft_universal_mobile_keyboard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dd963c5-de2c-48d6-8506-253a7dacb195/72154058126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95fc5360-0310-498d-9bf5-4c59c280d571/who_died_from_little_house_on_the_prairie.pdfIn PDF document text
    • https://6a9ecc2b-05c3-4056-8705-773ae6be8cdd.filesusr.com/ugd/7a359d_e8d714d594224317a510b21027462da9.pdf?index=trueIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_0cd6f3c07e3b402082ce34baadb17827.pdf?index=trueIn 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_off0000f1f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F4 5460 bytes
SHA-256: 9169724dfa0605f6fa786f81210a15803d5cfd34fc77efc4e7d49986e9de1bd3
font_01_sfnt_off0001046b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046B 12680 bytes
SHA-256: a01264a0944ca3ff4459b479bc5a038be3cce751cc082cdbeaec7baf4a3ed521
font_02_sfnt_off00012d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D67 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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