Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c5d81a244a6f90…

MALICIOUS

PDF

83.5 KB Created: 2021-03-14 23:29:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cd290236b2679787362a84ed794b713c SHA-1: 7658d7a20297571a7dbb6c440851c419ad3670c6 SHA-256: 12c5d81a244a6f90be814cf3d410fe3bc42d9550cbc63d91baf841e54965ac9b
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it is a link farm designed to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or scamming by offering fake game rewards. No scripts were extracted, but the presence of external URIs points to a redirection-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://ponafet.ru/wix?keyword=coin+master+free+spins+link+no+verification+2020 PDF link annotation
    • http://skameyki.club/what_are_the_distinctive_features_of_the_prehistoric_periodxzrui.pdfIn PDF document text
    • http://muvibigi.22web.org/dutofavewapixi.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/jamjjje/65496081559.pdfIn PDF document text
    • http://obschee.xyz/dnd_5e_subclasses_bardl0yzg.pdfIn PDF document text
    • http://sweetygirl.club/43838162778vrjsu.pdfIn PDF document text
    • https://cdn.sqhk.co/nixibaraje/njihdia/black_panther_mask_target.pdfIn PDF document text
    • http://mujojodisi.22web.org/mogifinogifovawa.pdfIn PDF document text
    • https://cdn.sqhk.co/gipekoma/DzJThcc/rerovovufodolotat.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/GGjcidb/68115865973.pdfIn PDF document text
    • http://bonmarket.site/how_to_light_up_an_inglenook_fireplacemxdng.pdfIn PDF document text
    • http://leninuludobodu.mygamesonline.org/vabakenowub.pdfIn PDF document text
    • http://vesalagigubu.22web.org/definition_for_the_word_monstrous.pdfIn PDF document text
    • http://idealica-ordina.site/twilight_books_in_order8lc37.pdfIn PDF document text
    • http://suwufexez.sportsontheweb.net/what_the_purpose_of_a_mortgage_deed_look_like.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kelopejawutan.rf.gd/96948566207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50fc1a66-5875-446b-a366-3797f30464de/dadegisujez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f68456f3-73bd-43bf-904b-5791f1e3be66/why_is_australia_so_special.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99b6a8ce-9aa9-4221-8bf9-8a15e35a5340/graphic_design_bookstore_amsterdam_course.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8394904-1a63-43a7-bdb5-934916e7202f/youtube_how_to_crochet_socks_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30ef8fc2-95cb-409f-adfc-bb5b1b4467c8/wujifakogopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da188c1c-e902-4710-97ab-5e6b91349b0a/1668986200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91f54370-60b1-425e-9181-3dda9b9b27d2/kilemixezafamirek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d21e5df6-513b-486c-95be-04a914982a27/97631928591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44c3bc88-fafc-453d-a012-f86ada3e2238/yanmar_marine_diesel_engine_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11021f06-fbe7-4816-99cd-2ce4019154dc/6463093848.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_off0000f156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF156 5464 bytes
SHA-256: e3765cf206d72b420495b9e3630ab203a2eb6becaa6037a6d3f8ee08f49088b8
font_01_sfnt_off000103d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D5 11108 bytes
SHA-256: 57839906d612205fec86044cb5b081c769e4b0f11a3a28bdeb544aa527866293
font_02_sfnt_off000129f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F7 16304 bytes
SHA-256: 0a2507360a40dd56b84230664db2b3a2689cb34b0aa642599c8245950ba374cb