Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20a83b864a4432a…

MALICIOUS

PDF

83.8 KB Created: 2021-03-03 11:10:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c0055bcbd488761bfe1735ff64b0aab4 SHA-1: b1b7e25e51f1371e5dfecc12c1e45717a125f5c4 SHA-256: e20a83b864a4432a3b34ed5740e199eb0c6811eec2bdec079a6410c8c4a14054
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic identified it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=why+is+my+iliopsoas+so+tight PDF link annotation
    • http://vopugixeroramox.medianewsonline.com/photoshop_cs5_step_by_step_tutorial_for_beginners.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/allegiant_movie_ending_songzp94x.pdfIn PDF document text
    • http://bcpzonasegurape2-viabcp.com/baahubali_1_tamil_dubbed_moviebqijt.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/what_is_shear_lag_in_composite_beams.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/rorigavasijej.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/zebefuza.pdfIn PDF document text
    • https://sugelama.weebly.com/uploads/1/3/4/8/134898925/31974.pdfIn PDF document text
    • https://mowofagafuvu.weebly.com/uploads/1/3/4/5/134594922/saxudidovowar_xelurukuf.pdfIn PDF document text
    • https://cdn.sqhk.co/loxusovi/c3je85N/ludo_online_king_dice_star_game_download.pdfIn PDF document text
    • http://terakusinuw.mypressonline.com/88916512091.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/gjjgiaJ/sapivegonanejexanonola.pdfIn PDF document text
    • https://cdn.sqhk.co/feletitami/f9ih8zk/recipe_ice_cream_sandwich_cookies.pdfIn PDF document text
    • https://cdn.sqhk.co/lilavokolet/jiNXgc3/steven_universe_movie_music_lyrics.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/lawul.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/84562512919.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/17_day_diet_cycle_1_grocery_list.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/intermediate_language_lessons_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/soap_api_documentation_template.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F7 5252 bytes
SHA-256: 01a60d94a88cc2c36f941db6e0fc1b4f20d3b9369bc455a64a325d36f6e22a9d
font_01_sfnt_off000105ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CA 10876 bytes
SHA-256: ce3ea712399effe74602d47bb4a0b45367e94d42a08cee8807f7ef78331e6949
font_02_sfnt_off00012b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B4D 16164 bytes
SHA-256: 1f773c7a7450f03bde076cc55d70989549729bf7b3b780ce5eaadefca762edb6

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