Malicious PDF — malware analysis report

Static analysis result for SHA-256 056d73620f6a71ce…

MALICIOUS

PDF

78.6 KB Created: 2021-03-20 23:00:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 90bddf2ff8ac4110d7c1b474cb8b3aa0 SHA-1: e6d4a360849e42c67f3fc798cb8860b7ad6651ad SHA-256: 056d73620f6a71ce3452cb92a39b17ef774fc0de94fe94ecab81c395466aa07c
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 external URIs, with one specifically pointing to a suspicious domain 'fokemale.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan sample. The document's structure suggests it's designed to act as a lure, likely to redirect users to malicious content or initiate further downloads.

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://fokemale.ru/123?utm_term=bar+graph+worksheets+for+4th+grade PDF link annotation
    • http://gibipimaxadebip.iblogger.org/sawowofujuwigowiv.pdfIn PDF document text
    • http://faceit.su/microsoft_word_spell_check_dictionaryn2lxj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402267/normal_60034d5f23b0d.pdfIn PDF document text
    • http://apparentlyopt.com/vokumidojetanimumotpn1d2.pdfIn PDF document text
    • http://zowiramizowomo.iblogger.org/35295733091.pdfIn PDF document text
    • http://alcexpress1.xyz/cuales_son_las_causas_de_vertigo9q9vz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384484/normal_600f06394d87f.pdfIn PDF document text
    • http://linza.media/pufigexeno8cdog.pdfIn PDF document text
    • http://world-wild-shop.com/does_arthritis_come_from_cracking_knucklesar8t1.pdfIn PDF document text
    • http://braco.ru/excel_vba_message_box_two_linesvzagx.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://bb0106b8-f3e0-414b-a873-a0e24df3f2ad.filesusr.com/ugd/b84a33_78c207e1a0284255954377dcb5ff6af1.pdf?index=trueIn PDF document text
    • http://vuripuwap.epizy.com/53555219253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f25c5b7c-1c95-40e0-a6a5-5df64c70923c/gamesir_t1d_controller_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9d334b9-27b6-4cc6-8e25-459349a9bf5f/43253785828.pdfIn PDF document text
    • https://5a98ae10-8c7e-48da-b83f-9bcbc644cfa3.filesusr.com/ugd/9a8764_77a9d3f8b6ca4937af7a87588d343cdf.pdf?index=trueIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_09742e5588564e208a2d11b662612ae3.pdf?index=trueIn PDF document text
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_be941a1aa70c4186ad5d047c9d292280.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a829f906-30be-4a04-94e1-2ae6606b122d/42992198587.pdfIn PDF document text
    • https://0b670cc3-d94b-4117-8b98-7ce677fb6c21.filesusr.com/ugd/7bc559_cbd10a14cde744f9b3c1929158b7234f.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_off0000e7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E8 5196 bytes
SHA-256: 9387eadcb620af2dd6a374901d2fb90f3e686a3a12777bc8e121ed7a686f5bb9
font_01_sfnt_off0000f9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C0 10452 bytes
SHA-256: fb6dadd80675319d053d962c3a1747ac15ce7d1750feed5a83b8911f62c266f3
font_02_sfnt_off00011d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D53 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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