Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30e457d6d307f87…

MALICIOUS

PDF

77.6 KB Created: 2021-03-03 04:35:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 89575fb237fab34c317792c6fc2edb91 SHA-1: 8be25bd43e08cebbbc412a49e9707ee6ec85d61c SHA-256: e30e457d6d307f87727952e5a254d9b5b0690da53b57d43c109cdc51f20a232c
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including ML classifiers and ClamAV, indicating malicious intent. It contains numerous external URIs, with a primary one being https://gimoguvi.ru/award?keyword=firehouse+small+turkey+sub+nutrition, suggesting a phishing or scam lure. The document's structure and embedded links point towards it being a link farm designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://gimoguvi.ru/award?keyword=firehouse+small+turkey+sub+nutrition PDF link annotation
    • https://tupuzosajabol.weebly.com/uploads/1/3/2/6/132695591/d3d429cc97f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370090/normal_5ff87daab79a5.pdfIn PDF document text
    • https://jotulamopusojo.weebly.com/uploads/1/3/4/4/134465369/mibunezobuwunud.pdfIn PDF document text
    • https://ludiwutigavas.weebly.com/uploads/1/3/4/6/134697468/loxexopowumor-lowekumubibati-fixubuzex-tabojako.pdfIn PDF document text
    • https://woxigixekamut.weebly.com/uploads/1/3/0/7/130739530/pifogimomomoker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414688/normal_6010f5cca9a86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447916/normal_5fd7106b7573c.pdfIn PDF document text
    • http://pabulaluxe.iblogger.org/85421727342.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lotawovuvowuk.rf.gd/when_i_look_up_it_hurts.pdfIn PDF document text
    • http://bokizimumizom.epizy.com/lorexarenowazawuna.pdfIn PDF document text
    • http://fokemadet.epizy.com/lagu_blackpink_whistle_english_rap.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/annual_report_of_reliance_jio_2015-_16.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/33718171101.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/sojorumof.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_off0000f27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27B 5184 bytes
SHA-256: 22a6b030a69da36a27bfd0fc81772d03c02c414df7b1b7f64f557728fb86cce5
font_01_sfnt_off000103f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F9 11088 bytes
SHA-256: a9e4d4fe0c0d72cd64372dadc9de0f3580c668adeee263f7845d3c0723305fda

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