Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e4f6c8f6c8dbc1…

MALICIOUS

PDF

170.0 KB Created: 2021-04-25 19:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1d890f5f748ddec5d192e693b20f3a75 SHA-1: be0577750fdc74bf7eb90362bd3a6afd32d48543 SHA-256: 15e4f6c8f6c8dbc1bc0e9a748865f5385d0544b2e31e5c2576a687429910d10c
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a likely phishing or malware distribution attempt. Although no scripts were explicitly extracted, the presence of external URIs and the overall heuristic profile strongly suggest the document's purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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/strik?utm_term=matlab+subplot+axis+font+size PDF link annotation
    • http://titanovyi-filtr.ru/patosevebbi4y0.pdfIn PDF document text
    • http://kemytbok.xyz/bonafide_certificate_format_in_marathiq10m0.pdfIn PDF document text
    • https://tebemixaziwig.weebly.com/uploads/1/3/4/8/134889210/boweworudixukegijul.pdfIn PDF document text
    • https://bawuzuxagoju.weebly.com/uploads/1/3/4/3/134340420/zerifexo-lemefama-kowuwavijak-pefadulaji.pdfIn PDF document text
    • https://rejasujewefem.weebly.com/uploads/1/3/0/7/130738882/57c15094a0430.pdfIn PDF document text
    • https://sididipukiwe.weebly.com/uploads/1/3/1/3/131398020/177940.pdfIn PDF document text
    • https://mibirewisurux.weebly.com/uploads/1/3/5/3/135313447/zetuvumulivad_kobefadizonije_rifafanalolu.pdfIn PDF document text
    • https://dugepenen.weebly.com/uploads/1/3/1/3/131379306/5276197.pdfIn PDF document text
    • https://fubudebuz.weebly.com/uploads/1/3/2/7/132712336/kegononosimav.pdfIn PDF document text
    • https://jogotipopawufi.weebly.com/uploads/1/3/0/7/130740597/posudobukakireli.pdfIn PDF document text
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/491086.pdfIn PDF document text
    • https://kagodititaf.weebly.com/uploads/1/3/4/8/134868324/3868700.pdfIn PDF document text
    • http://doordash.link/xirusediwexitumeminadwxog8.pdfIn PDF document text
    • http://irisca.online/what_are_good_books_for_3rd_gradersqx1f8.pdfIn PDF document text
    • http://naturaleone.space/the_almighty_sometimeslur17.pdfIn PDF document text
    • https://vedoguru.weebly.com/uploads/1/3/1/3/131380953/sabuwamum-sukodiwu-rexab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/tecfil_catalogo_eletronico.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/30122258891.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/what_is_included_in_harley_10000_mile_service.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5D 111704 bytes
SHA-256: ddb6254faf2e6d503056e26512bbcc542e75d8dc21b48fbb570b342c40b89179
font_01_sfnt_off00024887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24887 5064 bytes
SHA-256: cd3eb22a34d88929f16419a0f6a62a93f82a63facb73608f15bb17110568ee43
font_02_sfnt_off000259ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x259EE 11852 bytes
SHA-256: 12a1124ec6582280832df3452fd972b5f90ea5dfae2b42ece4468c809cb51ee0
font_03_sfnt_off000282b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x282B6 16036 bytes
SHA-256: bc1c1644e30597ae0beaac312b9749a82b64e26c109397326cdc67fdbaf2fe17

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