Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c047b8ac16fa09d…

MALICIOUS

PDF

89.3 KB Created: 2021-03-25 00:27:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 35f5169e4caacc1817ce5266d52a328e SHA-1: 396796b8641986f07e8f03068aeb0052e7948004 SHA-256: 7c047b8ac16fa09d1762e604102e6a3c7f604f56464c70bc6f9bc0ddd0df1de8
186 Risk Score

Malware Insights

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

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 0.9992

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/strik?utm_term=military+phonetic+alphabet+uk PDF link annotation
    • https://demaxezobenila.weebly.com/uploads/1/3/1/8/131856353/0323cd.pdfIn PDF document text
    • https://malizopal.weebly.com/uploads/1/3/5/9/135962708/2dec4c17779a5.pdfIn PDF document text
    • https://wixewolo.weebly.com/uploads/1/3/4/5/134577565/6513981.pdfIn PDF document text
    • http://prostosite.site/10102845838e3vzv.pdfIn PDF document text
    • https://pivatebovuwize.weebly.com/uploads/1/3/0/7/130775292/b707e4.pdfIn PDF document text
    • https://lerofiputa.weebly.com/uploads/1/3/4/3/134367001/pivasope.pdfIn PDF document text
    • https://jawizadobem.weebly.com/uploads/1/3/4/7/134773472/gesafukin.pdfIn PDF document text
    • https://tuzisufuga.weebly.com/uploads/1/3/4/4/134458332/423551.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/security_access_control_system.pdfIn PDF document text
    • http://gk-kuban.ru/doc_watson_deep_river_blues_tab52902.pdfIn PDF document text
    • https://wawumojobov.weebly.com/uploads/1/3/5/3/135323155/31196f.pdfIn PDF document text
    • http://nutetuxiv.mygamesonline.org/oracle_sql_certification_worth_it.pdfIn PDF document text
    • https://wilubiluzitewi.weebly.com/uploads/1/3/1/4/131413550/3572333.pdfIn PDF document text
    • https://fobijolosa.weebly.com/uploads/1/3/4/7/134730704/7731677.pdfIn PDF document text
    • http://acupofjacob.com/chick_fil_a_menu_nutrition_salad_dressingsxv59o.pdfIn PDF document text
    • http://wildboost.club/49201051508t2a2g.pdfIn PDF document text
    • http://idealica-it.website/slot_machine_games_free_play8oniu.pdfIn PDF document text
    • http://gudokav.sportsontheweb.net/adobe_converter_download_for_windows_10.pdfIn PDF document text
    • http://geparup.scienceontheweb.net/asthma_adalah.pdfIn PDF document text
    • http://vumajufeboxidik.mywebcommunity.org/20651537401.pdfIn PDF document text
    • https://pekumovulimezel.weebly.com/uploads/1/3/4/3/134363026/jegitex.pdfIn PDF document text
    • http://pawezujexas.mywebcommunity.org/what_type_of_exercise_is_best_for_parkinsons.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gefilodeza.myartsonline.com/66671098249.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/chopin_ballade_no_4_sheet_music.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_off00011ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA2 5152 bytes
SHA-256: 5d0dff407c2905e3d6942aa5744b4cf59a47ec96aed1f53a493c7524c7f278ce
font_01_sfnt_off00012d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D34 12500 bytes
SHA-256: 64db23a0121dd25226e3da49decafeb90ccc10d9de447ea2e91803777096d494

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