Malicious PDF — malware analysis report

Static analysis result for SHA-256 2547431c15520c30…

MALICIOUS

PDF

76.1 KB Created: 2021-05-22 03:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6a10e117f951ea3f0ba2faf097ac530f SHA-1: 3ea70f9ff61a9b849ff1db111cf7e728db786f3e SHA-256: 2547431c15520c3011f377a29367f9a9e34f22ffeb27037e6d40c8a71fd4fb20
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or scam attempt. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The primary external URL points to a site that appears to be part of a lure, using a search query as a pretext to drive traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://gimoguvi.ru/strik?utm_term=how+to+setup+turtle+beach+headset+xbox+one PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382186/normal_6052cd6fd70da.pdfIn PDF document text
    • https://merugerizun.weebly.com/uploads/1/3/4/3/134337850/nufebawosarojujaduka.pdfIn PDF document text
    • https://nodokesomizi.weebly.com/uploads/1/3/4/6/134656280/6028826.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411916/normal_603f06a91293e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470028/normal_5feb781b3b3c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496816/normal_601c790d9112e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464532/normal_602a349cde666.pdfIn PDF document text
    • https://nudareniwode.weebly.com/uploads/1/3/1/8/131856427/tifixivuwixewukoli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501975/normal_5fc75b9e72d5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443809/normal_604626797479e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/kirby_clash_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/69504498641.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/disumaxalajakapezi.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/how_many_years_does_kindle_battery_last.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/christian_community_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9574b073-7919-4dfc-b65f-c7b90cc7bf33/what_is_the_cost_of_living_increase_in_ontario_for_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0de6412-84a5-48e8-8e0d-5d90a8a3b40f/rolivigasikut.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/36806275732.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/abundante_cantidad_de_bacilos_gram_positivos_corineformes.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/gezamotusogixawo.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/ankusam_rajashekar_songs_free.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_off0000eb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1F 5420 bytes
SHA-256: cd49a1cc01d50fab623c8b818af97d03a02b79e55d4a64405fcb9c9bd2bb48da
font_01_sfnt_off0000fd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8E 10844 bytes
SHA-256: 67baa3b276e6e3a394ef71d029b38db68aee213eb02db548c1f832fc81aedb98

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