Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e873c5c967e3e3…

MALICIOUS

PDF

80.5 KB Created: 2021-03-16 08:37:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37bcbf5c54843af03cc5508e509cf06e SHA-1: 742385ab68ba7b37eb1107eab9c6383547512e3c SHA-256: 10e873c5c967e3e32175a817f83ea3ce8a9ca68045a9b8ad3a47e8b7c4de6c9d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO spamming operation. One of the embedded URIs, 'https://lozipotod.ru/wix?keyword=vas+pain+scale', is likely part of a phishing or scam campaign. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/wix?keyword=vas+pain+scale
    • https://zekorawuj.weebly.com/uploads/1/3/4/8/134862422/fcf786.pdf
    • https://wazexexa.weebly.com/uploads/1/3/5/3/135305699/bokanurinej_metoxod_werejotudiferis_ninexipuxij.pdf
    • https://dazenesulamese.weebly.com/uploads/1/3/1/1/131164173/6813973.pdf
    • http://1fps.ru/37595978268bxqjm.pdf
    • https://rukinedofixod.weebly.com/uploads/1/3/4/3/134348838/fonelejotanefaz.pdf
    • https://nefupoxuwuridek.weebly.com/uploads/1/3/4/7/134747690/wumiginigar_donotezap_folig_xonaxepagowodu.pdf
    • https://vaxofawaz.weebly.com/uploads/1/3/2/6/132682661/d88c73ef67.pdf
    • http://flowerport.shop/phonetic_alphabet_military_vs_police8r9y3.pdf
    • https://bepupoxusiboma.weebly.com/uploads/1/3/4/8/134847186/parera.pdf
    • http://smartcreditus.info/baby_jogger_bassinet_fitted_sheet28a0q.pdf
    • https://pezuzaje.weebly.com/uploads/1/3/4/5/134577214/sikasumugu_sipava.pdf
    • https://nokavapeselodes.weebly.com/uploads/1/3/4/6/134638024/9e95099861cc76b.pdf
    • http://grafoanaliz.ru/chapter_11_cell_communication_chapter_review_answerst40ju.pdf
    • https://bakogala.weebly.com/uploads/1/3/1/3/131384254/21936.pdf
    • https://nabezaxe.weebly.com/uploads/1/3/4/8/134852032/393d74d458770e.pdf
    • https://luludosob.weebly.com/uploads/1/3/4/7/134703274/dakevodukixaniraz.pdf
    • http://simkosa.website/what_is_night_in_greek4gjyk.pdf
    • https://lafefozusut.weebly.com/uploads/1/3/4/5/134597047/108e3c83081295.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_2b71bb14c1694e51b9609302eb196430.pdf?index=true
    • https://abee6ad4-cf47-459a-954e-22b9b9bb30ad.filesusr.com/ugd/4bdc6d_a41d76b48509478c9b289a4ea0b95715.pdf?index=true
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_2af384909b454eb6adfb64624743cae7.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f178.bin
aef751caa9ba453fba794ad7c4ed255cf8c617a8541170a2b8bc9c8c6b5f62d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF178 4392 bytes
font_01_sfnt_off00010061.bin
71d84fea04b02e1f0d6750d89506f17939c5aeb0b2e4ed6e1ec073b4b50ac1ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10061 11400 bytes
font_02_sfnt_off00012727.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12727 4324 bytes

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