Malicious PDF — malware analysis report

Static analysis result for SHA-256 99db0e8b17e9274a…

MALICIOUS

PDF

79.8 KB Created: 2021-03-16 21:25:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7d37caaf8bd1dfee25d0d6a2e9618c18 SHA-1: ef09612796c4fe7ecde346e38cb9851ae84b5b89 SHA-256: 99db0e8b17e9274aacf56878fa614d54059a7f2d10f20e0a12ba4fdb3bfcaad1
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://bologen.ru/wix?keyword=ruin+and+rising+pdf+download PDF link annotation
    • https://cdn.sqhk.co/matezafun/NGDsFjf/btd5_hacked_weebly.pdfIn PDF document text
    • http://bumululoru.mywebcommunity.org/bmw_brochure_3_series.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/nowadizifafiritife.pdfIn PDF document text
    • https://sivusizawijavoj.weebly.com/uploads/1/3/4/4/134482483/tafeva_buzixa_lufimo_lamejewo.pdfIn PDF document text
    • http://narovomesizi.medianewsonline.com/sezejuwepowapapuwake.pdfIn PDF document text
    • https://xososikanezav.weebly.com/uploads/1/3/4/8/134892973/vunuvarawuwijuj.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/ggifjiw/rokuxagodawo.pdfIn PDF document text
    • https://dupagerenukuxat.weebly.com/uploads/1/3/4/7/134751723/dudojufo-mezovo.pdfIn PDF document text
    • https://cdn.sqhk.co/xajevedu/ib2gdCP/88044563358.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://7605c768-a471-4169-85a9-0dab509fd250.filesusr.com/ugd/20ab23_edf627df0bbf4a3c8711ec81d78c31ee.pdf?index=trueIn PDF document text
    • https://1527c8d3-3321-4e9f-872f-e2bebb57bac2.filesusr.com/ugd/bf2d42_7a63b742196f4ab0b942d63b55d6a814.pdf?index=trueIn PDF document text
    • https://71a5d838-4e22-4830-8da1-7955ec3365f5.filesusr.com/ugd/f2f43e_1fc56589d9eb44c1a4bb290b66f907cd.pdf?index=trueIn PDF document text
    • http://funasuruwet.epizy.com/9291376304.pdfIn PDF document text
    • http://panurimo.epizy.com/64371000984.pdfIn PDF document text
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_93c7980ed49f490f9c350f0700f19996.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/naruwinesikelolokel.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/captain_marvel_comics_online.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB18 4992 bytes
SHA-256: 42d5ee9cbd2eef5fd7f7dd42f6b36f9112ad46c7c8fb223af18470ff8083c0ac
font_01_sfnt_off0000fc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC24 11184 bytes
SHA-256: e1ed36d468c3598d42c307bdfca74dc9a0ee70e08e58547e45b13c0d41b69b49
font_02_sfnt_off00012257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12257 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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