Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d35edcd4d56272…

MALICIOUS

PDF

73.8 KB Created: 2021-04-05 14:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1321c2321c1857600fb1fb3d45b06bf SHA-1: be0b849d116be2953e67c0195a03fe29e8bf865d SHA-256: 09d35edcd4d56272270ad71d45195849196c5e6fb914ba8e04820ddcc9eb9817
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malicious content delivery attempt. It contains a large number of external links, many of which are likely part of a link farm or SEO manipulation scheme, with one prominent URL being https://ponafet.ru/wix?keyword=chart+tables+2+to+20. The document body is heavily obfuscated and unreadable, but the presence of numerous external links suggests an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ponafet.ru/wix?keyword=chart+tables+2+to+20
    • https://cdn-cms.f-static.net/uploads/4406789/normal_600ea7517b537.pdf
    • https://static.s123-cdn-static.com/uploads/4369783/normal_5ff23b613c99a.pdf
    • https://jipunone.weebly.com/uploads/1/3/5/3/135349916/adcba5ff8.pdf
    • https://xitolomeka.weebly.com/uploads/1/3/4/0/134012462/b4f8164a18.pdf
    • https://cdn-cms.f-static.net/uploads/4446502/normal_60581dff106b8.pdf
    • https://cdn-cms.f-static.net/uploads/4451221/normal_6011897c6f68b.pdf
    • https://bemetezebore.weebly.com/uploads/1/3/4/8/134882820/9d28011.pdf
    • https://jotulamopusojo.weebly.com/uploads/1/3/4/4/134465369/53fa363aec8209b.pdf
    • https://static.s123-cdn-static.com/uploads/4406809/normal_5fe429829a213.pdf
    • https://getenulezawo.weebly.com/uploads/1/3/4/8/134897364/tawazif.pdf
    • https://cdn-cms.f-static.net/uploads/4464534/normal_6058f5d200d95.pdf
    • https://static.s123-cdn-static.com/uploads/4366956/normal_5fe30dafde057.pdf
    • https://cdn-cms.f-static.net/uploads/4446636/normal_602c4ff3e760a.pdf
    • https://cdn-cms.f-static.net/uploads/4366321/normal_6011b630c83a5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/816e866e-b0d1-4b93-a790-69364cacd1ea/fawerugaxe.pdf
    • https://s3.amazonaws.com/simujix/36651637703.pdf
    • https://s3.amazonaws.com/jejulurowev/what_is_the_rarest_human_mutation.pdf
    • https://uploads.strikinglycdn.com/files/4c78c117-a60f-46ea-8aa0-b134865b4f41/hp_w1907_resolution.pdf
    • https://s3.amazonaws.com/baritexovopa/71662977017.pdf
    • https://s3.amazonaws.com/jopomodilamego/is_mazda_cx_7_2011_a_good_car.pdf
    • https://s3.amazonaws.com/suxuzubojut/sasozobajatalisuzoliwag.pdf
    • https://s3.amazonaws.com/nefomojuwet/aov_richter_guide.pdf
    • https://s3.amazonaws.com/tufujifinobiro/xaxenumogubilubuzo.pdf
    • https://s3.amazonaws.com/rawesaragegugar/zozasudafemelukog.pdf
    • https://s3.amazonaws.com/viboxikuz/luzurori.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_off0000e4df.bin
1ca448665f246c3adf761bc4ce3b4f5f0e506ce7320704883e864faadea284b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DF 5092 bytes
font_01_sfnt_off0000f61a.bin
70d32f2f4204d6422981193a05b67ae762ef475070d14f0fcd84c3c4243cc145
pdf-font-stream PDF embedded font (sfnt) at offset 0xF61A 10436 bytes