Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf9e1764b949724b…

MALICIOUS

PDF

75.1 KB Created: 2021-06-08 01:37:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 97d66173421421b612adb0a35cc25dd4 SHA-1: 0463f79ba7666070749e882d90edeabb49344665 SHA-256: cf9e1764b949724bcf97b8fd9087fddcbd09749ae60b870bf82cbe3682e45e7b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to 'https://nomylo.ru/pbw?utm_term=the+gendered+society+2nd+edition+pdf', suggesting a phishing or malicious content lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, further supporting a malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://nomylo.ru/pbw?utm_term=the+gendered+society+2nd+edition+pdf PDF link annotation
    • https://vizavidonase.weebly.com/uploads/1/3/4/0/134040461/rukomul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446275/normal_5fc9e58c468fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413865/normal_600c7d911fe66.pdfIn PDF document text
    • https://botabire.weebly.com/uploads/1/3/4/6/134629411/ab291020139.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462352/normal_60247db063239.pdfIn PDF document text
    • https://lonewarole.weebly.com/uploads/1/3/4/5/134593790/2008491.pdfIn PDF document text
    • https://nobuwutuzuta.weebly.com/uploads/1/3/4/8/134884415/muvevanolojamikopose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488103/normal_60622d11ca268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413454/normal_6022675aa6984.pdfIn PDF document text
    • https://sedufusirofop.weebly.com/uploads/1/3/7/5/137511108/gafotapomaz-vulekerilubilu-vumamenig-pelejedi.pdfIn PDF document text
    • https://xonarupitowij.weebly.com/uploads/1/3/4/6/134617661/zuzozirumixab-monus-gekujuxakopa-lijage.pdfIn PDF document text
    • https://mipijipibax.weebly.com/uploads/1/3/4/8/134873473/f741c61.pdfIn PDF document text
    • https://kojaxinepizoju.weebly.com/uploads/1/3/1/8/131856409/ginudolepuvadido.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/55520cb9-6f8b-426e-b95d-b5edd070f886/bazakogonafubomuvidog.pdfIn PDF document text
    • http://zalemofe.pbworks.com/w/file/fetch/144690696/walmart_bcg_matrix_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f572f6-fe50-4dd9-bbd1-577b2af31eda/tiliporozofokokavirojeju.pdfIn PDF document text
    • http://vawijoj.pbworks.com/w/file/fetch/144819828/valuation_cm1_histoire_les_gaulois.pdfIn PDF document text
    • http://sovafiben.pbworks.com/f/vekofubodeter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ce717e9-f192-4c8e-970f-f029899ae360/the_fugitive_the_other_side_of_the_mountain_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7afb919-661c-455d-a6f3-816847106027/57967373197.pdfIn PDF document text
    • http://vosebim.pbworks.com/f/example_of_claims_of_policy_brainly.pdfIn PDF document text
    • http://rasovuxosew.pbworks.com/f/simplifying_fractions_puzzle_worksheet.pdfIn PDF document text
    • http://dajodovilav.pbworks.com/f/turn_on_wifi_dell_latitude_5480.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e58ed9a-ee23-4c37-af23-8cee1d2f92e8/how_to_buy_microsoft_office_for_macbook_pro.pdfIn PDF document text
    • http://nomebazeregi.pbworks.com/w/file/fetch/144763914/jugibibonogulitifiwujorov.pdfIn PDF document text
    • http://fodorafirig.pbworks.com/f/nefaxinotero.pdfIn PDF document text
    • http://zikupuzajix.pbworks.com/w/file/fetch/144434205/distinguish_between_formative_and_summative_assessment.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_off0000e898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE898 5360 bytes
SHA-256: 4d08f4c9270e1615377509537dac4972326d3546ebb0eb1de67baa3d99e57f5c
font_01_sfnt_off0000fae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE5 10584 bytes
SHA-256: 4c1ac8589586be742cbccbccb3db4e2a70d76e09e1a15c5c709504e66c59538e