Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ff2abeb5fdb5336…

MALICIOUS

PDF

92.3 KB Created: 2021-03-23 20:34:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: b419b7fd86c6995cf41e2251008fa323 SHA-1: 818298544ea325c5595351aa20c42123d1ea389f SHA-256: 5ff2abeb5fdb5336bdd8c3cd5fd72f4ea39aa047d559c1820a5e33bf43f8209f
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity, likely aiming to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://druttle.ru/award?keyword=bncc+educa%25C3%25A7%25C3%25A3o+infantil+pdf+mec PDF link annotation
    • https://mevimozow.weebly.com/uploads/1/3/0/7/130776561/b5f80f.pdfIn PDF document text
    • http://bagawixaj.mywebcommunity.org/mixapisufoxitiwomovarotex.pdfIn PDF document text
    • https://fekobuwag.weebly.com/uploads/1/3/1/8/131858403/4405527.pdfIn PDF document text
    • https://cdn.sqhk.co/xadopazo/12gfQA7/kubaletifufex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501360/normal_5fcad78ba3644.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/hiefege/drawer_slide_bracket_l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488332/normal_5fce39eb05e5e.pdfIn PDF document text
    • https://cdn.sqhk.co/xiladuxe/fZhjSgc/lojebedogedexokalozi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465262/normal_5ff9fe5132e8e.pdfIn PDF document text
    • http://manibupefif.mypressonline.com/bootstrap_4_complete_tutorial.pdfIn PDF document text
    • https://lulofaki.weebly.com/uploads/1/3/1/4/131453598/5609070.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404523/normal_601e6a043c300.pdfIn PDF document text
    • https://nonefipuxope.weebly.com/uploads/1/3/4/4/134493331/7309265.pdfIn PDF document text
    • http://xomofaki.getenjoyment.net/24067457117.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447916/normal_600bba9a4f4fe.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/ifUghct/masha_and_the_bear_costume_rental.pdfIn PDF document text
    • http://bivaxosufuxibo.mygamesonline.org/47348299211.pdfIn PDF document text
    • https://deriwofapavuz.weebly.com/uploads/1/3/4/3/134311795/tigefaserikuzabokow.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/5x5_workout_program_results.pdfIn PDF document text
    • http://tijukilebag.getenjoyment.net/69193469813.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://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_3ac7521202fe4c569763b87f8f8babbb.pdf?index=trueIn PDF document text
    • https://932aa67c-856a-4fda-9fc8-fe3f50d4acc2.filesusr.com/ugd/a25eee_10f0d2e4323147bd948ef574ab378570.pdf?index=trueIn PDF document text
    • http://fatavetotujel.onlinewebshop.net/adobe_photoshop_7._0_tutorials_in_marathi.pdfIn PDF document text
    • https://109d6476-c6f4-4eee-b84c-907698fb4207.filesusr.com/ugd/0d7ebf_854cb95fa0fa43068793e2470284bf05.pdf?index=trueIn PDF document text
    • http://zizenatoxu.myartsonline.com/pewivevorabitorobinivi.pdfIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_097a6866bc884299b73911cf49c0f273.pdf?index=trueIn PDF document text
    • http://gegurobaz.myartsonline.com/why_does_it_feel_like_ice_is_running_through_my_veins.pdfIn PDF document text
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_f69390c193914286a4cf65156783365b.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_off00011979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11979 5460 bytes
SHA-256: 8e4cacdd25c30cc96eda933dcb0bc51873003afb1e77238fb0de201730d397fa
font_01_sfnt_off00012b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B19 13368 bytes
SHA-256: e3f49d58b49753f930411b47dac8e6c2107cf606a417adcaf012505bedfbb53a
font_02_sfnt_off00015367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15367 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333