Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9f15665ceecd9c…

MALICIOUS

PDF

73.9 KB Created: 2021-03-22 02:17:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6dea988f6207312bf2d34cd2931314d3 SHA-1: 128510ff9ae4d7a5f218b814c0e27cb4a7db99cb SHA-256: ae9f15665ceecd9c5ac1929565234838dff7876f2e703236cc0ccbf96bb1a7b7
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://pelibifir.ru/123?utm_term=gasconade+river+fishing+report PDF link annotation
    • http://sibogufurab.medianewsonline.com/silent_words_in_english_language.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388276/normal_6019ba866ec8a.pdfIn PDF document text
    • http://gudutisiluzew.mypressonline.com/security_analysis_summary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476947/normal_5fcf82414167a.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/doxafufigesibib.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/dAhepvk/lelojimabupipo.pdfIn PDF document text
    • http://bovibuvebus.getenjoyment.net/complete_key_for_schools_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481173/normal_60391e6283da6.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/cL9ZEji/battle_tops_arena.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wafugid.epizy.com/juvizaxakorimiz.pdfIn PDF document text
    • http://jasivirenum.rf.gd/47149772452.pdfIn PDF document text
    • http://pevipitoz.atwebpages.com/realflight_7.5_dongle_emu.pdfIn PDF document text
    • http://zekafoforom.epizy.com/91108581025.pdfIn PDF document text
    • http://pubodetag.rf.gd/41096834898.pdfIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_421f83d2d512484c83f028d15421ca8a.pdf?index=trueIn PDF document text
    • http://tebuwawezizafes.onlinewebshop.net/26567843326.pdfIn PDF document text
    • http://legokejapo.atwebpages.com/ernst_haeckel_kunstformen_der_natur_1904.pdfIn PDF document text
    • http://pujumek.myartsonline.com/97008673706.pdfIn PDF document text
    • https://a6f18165-9bfd-46c9-8f51-0ab50cd0b687.filesusr.com/ugd/265c7a_7734d15dd3c14890ac637f69f366e6f0.pdf?index=trueIn PDF document text
    • https://38a589f5-619b-4230-bc7d-f88d9fc6dac5.filesusr.com/ugd/392051_4364f904594b46c18f9f6c66ceaa6b12.pdf?index=trueIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/95960334495.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E9 5476 bytes
SHA-256: 2e134b8e09abbf7e47c7469436dd6625daa8037a2f9d5069f7784de4fa5a4433
font_01_sfnt_off0000f694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF694 10512 bytes
SHA-256: a40d748a2b4eb539373b249073eadabd0d59862cd21cd772f833709e87cc7b4d

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