Malicious PDF — malware analysis report

Static analysis result for SHA-256 45d591a94de422de…

MALICIOUS

PDF

85.5 KB Created: 2021-04-24 19:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52e0543856c064ce0d45d79d3b3865be SHA-1: 75b76d25a3eafd4af2e5ac8e158ba40866b10c2e SHA-256: 45d591a94de422dea02a6750f5804c68abbc13ae83e4bc4d55d9e25ef4e19a24
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm designed to direct users to other sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. The embedded URLs, such as 'https://seumenha.ru/strik?utm_term=48+laws+of+pimping+quotes', are used as lures to external malicious domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=48+laws+of+pimping+quotes
    • http://constructionhouse.info/29441194548cxhj8.pdf
    • http://presentinsta.online/72029101664sjmsd.pdf
    • https://cdn-cms.f-static.net/uploads/4379736/normal_6031f815c5a1a.pdf
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5fda8fa957f26.pdf
    • http://nerazegizetikam.getenjoyment.net/90952697830.pdf
    • https://cdn-cms.f-static.net/uploads/4469860/normal_6057e79e8da37.pdf
    • https://jumugegapu.weebly.com/uploads/1/3/0/8/130814907/notek-togup.pdf
    • https://cdn-cms.f-static.net/uploads/4485580/normal_5fd998990f47f.pdf
    • https://static.s123-cdn-static.com/uploads/4421476/normal_5fe4d3e17af74.pdf
    • https://magijomolalol.weebly.com/uploads/1/3/1/4/131437319/7f3c68f7.pdf
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/05780821b81c8.pdf
    • http://solent.bar/5008271055wc838.pdf
    • http://theboldpantsproject.com/wemagimovabulekevebiwd000.pdf
    • http://warixedivukinat.mygamesonline.org/77138776643.pdf
    • http://kilekapalovuzo.getenjoyment.net/multimedia_authoring_system.pdf
    • https://cdn-cms.f-static.net/uploads/4401711/normal_601bc94e1d7b2.pdf
    • http://bivaxosufuxibo.mygamesonline.org/ps3_ejecting_disc_itself.pdf
    • https://cdn-cms.f-static.net/uploads/4415519/normal_601047c216466.pdf
    • https://cdn-cms.f-static.net/uploads/4495696/normal_60445a927c476.pdf
    • https://kumisorulilinim.weebly.com/uploads/1/3/4/7/134750082/566675397f296.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dorobukasawituw/lead_generators_international_sales__marketing_group_inc.pdf
    • https://s3.amazonaws.com/sowirutelevolur/betterwmf_v6._00.pdf
    • https://s3.amazonaws.com/lunojol/xuloniwisezejujato.pdf
    • https://s3.amazonaws.com/baxunaf/describe_what_elements_of_arts_and_principles_of_design_used_in_moriones_festival.pdf
    • https://s3.amazonaws.com/sowewazulejewi/risefisizijozigob.pdf
    • http://tobikinos.onlinewebshop.net/how_to_organize_meetings_in_ms_teams.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e31.bin
866503f3fdc2323211eb83c6f728b898c8e93a0279e4b1bbe900965b04eb4dfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E31 5532 bytes
font_01_sfnt_off0001210f.bin
b25f09b0af2ea19e0917c9862f61658ac010f944895e27ec4fce29f6becc0687		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1210F 11456 bytes

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