Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc754249aecc6a4…

MALICIOUS

PDF

155.2 KB Created: 2021-04-09 21:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 693a3c6845c3601a8596d9c971ce9e4a SHA-1: d70033a45ca757e3e13cd242446e0e367e7398db SHA-256: bbc754249aecc6a4a3675addcefa971e02f30cc8abe40fca6101f1420c5adace
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://bologen.ru/strik?utm_term=vip+loops+and+big+fish+audio+fuse+%2528kontakt%2529 PDF link annotation
    • http://legrand-spb.ru/308849686643y4fw.pdfIn PDF document text
    • https://jozinuzo.weebly.com/uploads/1/3/2/7/132712000/diligufom.pdfIn PDF document text
    • https://lowexupunodod.weebly.com/uploads/1/3/4/8/134896298/b52ce1.pdfIn PDF document text
    • https://zelejipez.weebly.com/uploads/1/3/4/3/134353750/6631134.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501054/normal_5fcbaafe254d6.pdfIn PDF document text
    • http://testrun.ru/20978587880vokx1.pdfIn PDF document text
    • https://juladugalevatib.weebly.com/uploads/1/3/4/3/134385664/8100347.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449779/normal_600ea8704c819.pdfIn PDF document text
    • https://jitolubupiloz.weebly.com/uploads/1/3/4/6/134637312/1760900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386091/normal_5fd7add695f5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465938/normal_6065099d22bcd.pdfIn PDF document text
    • https://lewixukulir.weebly.com/uploads/1/3/1/6/131606807/4417683.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405195/normal_5fc6216f5dd20.pdfIn PDF document text
    • https://sazefowefojewen.weebly.com/uploads/1/3/4/8/134893887/3304854.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://midodelawipage.weebly.com/uploads/1/3/4/5/134585137/3504dbc30e8b0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388067/normal_5fe695142fdf2.pdfIn PDF document text
    • http://reduslim-officialsite.site/monoxozorez5c048.pdfIn PDF document text
    • https://kerozusokenizil.weebly.com/uploads/1/3/1/3/131383247/wuzorogatogivu_lubasowew_sikufisofowekun_sopenekevo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b1f0a730-f0e4-4bcf-918d-a915077b90d0.filesusr.com/ugd/a7c69d_746f53de7a694954afa09727fc56b336.pdf?index=trueIn PDF document text
    • https://acfcda0b-1795-4b40-aedc-9a0bc13047ce.filesusr.com/ugd/89c6ad_d1d770b449324904be0559d41ab8432f.pdf?index=trueIn PDF document text
    • https://92923600-264c-4cb8-9d87-181083d4f0d6.filesusr.com/ugd/0bf43f_4ef976c234c34ed1970eb3d8d3330b7e.pdf?index=trueIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_7d6bb4ac1e6d4300b928898310474490.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20006 7732 bytes
SHA-256: e8ea07f0d8a2bdc57b5c039c1a64cc2efc4134e6210a57758d62c11df6dfe6b8
font_01_sfnt_off00021a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21A2F 5532 bytes
SHA-256: d027e5503acfbffc35755bfb27b1902ba8a04f4f39cffee4c399b031f975cf11
font_02_sfnt_off00022d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22D0B 15648 bytes
SHA-256: 09edd79ff3b050a75e01e8d24ae44f24817ecfb43dcbd5b3a25ecdaf46eb718c

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