Malicious PDF — malware analysis report

Static analysis result for SHA-256 342b77b42512512c…

MALICIOUS

PDF

76.5 KB Created: 2021-03-31 01:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e8ac17365b896a248ab6edd890851cbb SHA-1: abccb31eabfd495bea1aef215da0403c15de9153 SHA-256: 342b77b42512512c64e4134c974f456b76163b741a7eb64b412ba7f218531bc4
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 is flagged by ClamAV as a phishing/trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using search engine optimization techniques to disguise malicious links. The presence of external URIs suggests an attempt to redirect the user 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://soxebez.ru/award?keyword=econometric+analysis+of+panel+data+fifth+edition+pdf PDF link annotation
    • http://adachivia.store/a_little_life_bookansnn.pdfIn PDF document text
    • http://soul-felt.com/what_is_the_most_contributing_factor_to_climate_changehrdfu.pdfIn PDF document text
    • http://kvyovk.xyz/cambridge_dictionary_file_free_downloadbq6hi.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/J8WMgdf/crush_test_name.pdfIn PDF document text
    • http://mudixefibewab.mywebcommunity.org/52941420856.pdfIn PDF document text
    • http://rrrrkkkkk.space/7051351650u4twn.pdfIn PDF document text
    • http://sepukolobu.sportsontheweb.net/adoption_papers_form.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/cZAhche/skyrim_summon_dragon_priest_spell.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/aiiGSig/warpigs_galaxy_citra.pdfIn PDF document text
    • http://rosirodefi.iblogger.org/the_cure_lullaby_piano_sheet.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
    • http://zudupaxub.myartsonline.com/ge_cafe_dual_fuel_range_owners_manual.pdfIn PDF document text
    • http://fixidil.atwebpages.com/base64_to_convert.pdfIn PDF document text
    • http://gasadesa.epizy.com/vovopipenajemilajo.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/woxilisufixeropafinidava.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/cell_organelle_functions_matching_worksheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE028 5240 bytes
SHA-256: 0f0f70b216358bf0191dc296f8e292974c7b464ee49cc0626d455adc63194e51
font_01_sfnt_off0000f1c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C3 10652 bytes
SHA-256: a08b93feb5fd05e1cbd11490c67ccb1a1219a6b4ab0ce739f74332d06c249002
font_02_sfnt_off000115ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EE 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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