Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2378dfbf419582…

MALICIOUS

PDF

77.7 KB Created: 2021-01-22 02:50:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 05fc793a21870cd2ea941e47f60f8e7e SHA-1: e7b823d4bd9f28292de3ad366848342d9518325f SHA-256: 0e2378dfbf41958231e0e8f4a5df94163d62de3c66ab4f9a3c4bd3e45fb9d629
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or SEO abuse tactic. While no scripts were explicitly extracted, the presence of external URLs and the nature of the heuristics point towards an attempt to redirect users to potentially malicious sites, possibly for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://druttle.ru/123?utm_term=mta+mother+clara+hale+bus+depot PDF link annotation
    • https://wapaberupuz.weebly.com/uploads/1/3/5/3/135397773/1489808.pdfIn PDF document text
    • https://zukolarosaku.weebly.com/uploads/1/3/4/6/134662459/4379078.pdfIn PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/6a8fe3c197036e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481285/normal_5ff3ea61302e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529780/normal_5ff64c478eeaa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377371/normal_6008e562c0f54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454971/normal_6003dbae0f697.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384644/normal_5ffdc66d038bb.pdfIn PDF document text
    • https://riluvozig.weebly.com/uploads/1/3/4/3/134380056/49d62633fd39bb.pdfIn PDF document text
    • http://salejozokaboruz.22web.org/emulsion_polymerization_a_mechanistic_approach.pdfIn PDF document text
    • https://midigoxu.weebly.com/uploads/1/3/4/0/134000126/bikunigunezu.pdfIn PDF document text
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/xifuwex.pdfIn PDF document text
    • https://zikixitifo.weebly.com/uploads/1/3/4/8/134897390/6911968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501810/normal_5fd3a336dc1d4.pdfIn PDF document text
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/kojowavapeno.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485454/normal_5feffef961328.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473359/normal_5ff15b16ee676.pdfIn PDF document text
    • https://zugufirit.weebly.com/uploads/1/3/1/1/131163535/a766ce009de05.pdfIn PDF document text
    • https://sigojexubaj.weebly.com/uploads/1/3/2/6/132682800/aa21301390c2382.pdfIn PDF document text
    • http://memubalejegezur.66ghz.com/chrome_certificate_chain.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fobexegedun.epizy.com/gino_vannelli_brother_to_brother_sheet_music.pdfIn PDF document text
    • http://fizuxobitunoge.epizy.com/view_equifax_credit_report_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_off0000f0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BF 5460 bytes
SHA-256: b26870a4ff495fa26d54c4c3690d33743d935a17b0a31f858d6287b54c3e4fd8
font_01_sfnt_off00010321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10321 11628 bytes
SHA-256: 893a4c4b292c5be196f05bb6511761ad8d59b9a47e7d4707bad89827e184fa5e

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