Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f54cf09e4ab9f46…

MALICIOUS

PDF

75.1 KB Created: 2021-03-15 03:46:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 84dc30debdf8ce6e6a234227e6301383 SHA-1: f0664aace4cd447f38cc68561288d3f8b7039560 SHA-256: 7f54cf09e4ab9f462c210562338b9c394e70b9504efc47dca10048154d2361ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://seumenha.ru/strik?utm_term=toyota+corolla+2009+engine+size', and other embedded URLs suggest a phishing or malicious redirection scheme. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing lure.

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 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://seumenha.ru/strik?utm_term=toyota+corolla+2009+engine+size PDF link annotation
    • http://yourlivehelp.com/how_much_does_a_bowflex_max_trainer_m5_weight3pdns.pdfIn PDF document text
    • https://vomoxolakixirum.weebly.com/uploads/1/3/1/4/131438067/00e6eea5c6d8.pdfIn PDF document text
    • https://zotapuzuvekef.weebly.com/uploads/1/3/4/3/134323554/poxed-kekixozameter-mupogekowobim.pdfIn PDF document text
    • http://tesar-krd.ru/saint_seiya_awakening_mod_apk_unlimited_moneyvzk47.pdfIn PDF document text
    • https://wiwanozamo.weebly.com/uploads/1/3/4/3/134306351/segavatuzesaguvorobi.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/boss_telugu_songs_320kbpssdbvv.pdfIn PDF document text
    • https://vakasuvarepem.weebly.com/uploads/1/3/4/3/134328097/zozoxubotoz.pdfIn PDF document text
    • https://kivenawuvu.weebly.com/uploads/1/3/1/1/131163776/potiz.pdfIn PDF document text
    • https://voleruzogiz.weebly.com/uploads/1/3/4/6/134696629/jotezonogaxebiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_02d10ffac34a469e891bac299a1c2307.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/8793297253.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/free_bachelorette_party_scavenger_hunt_template.pdfIn PDF document text
    • https://ad060920-74d0-4a59-a46a-f478898ed72a.filesusr.com/ugd/a7c1e6_049abbe7c0624c08ab90590be87526c2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/australian_formal_letter_template.pdfIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_01ee887c68344f0780785572f983f6d9.pdf?index=trueIn PDF document text
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_e63cd2ff20ec4e4f8250138d64f0d153.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/roxawo/27084846106.pdfIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_24a6bd94bb364a08935281d99539c660.pdf?index=trueIn 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_off0000e848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE848 5496 bytes
SHA-256: 429d812511ecacfe6a33724d6d3722386de48ab9e67dcc481c993f377f635449
font_01_sfnt_off0000fb15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB15 10408 bytes
SHA-256: dcc9ce963f97977fae6f47be1823d3651d19ab528132e5cd77f07c8229c2d673

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