Malicious PDF — malware analysis report

Static analysis result for SHA-256 08cf7fa4dc291d70…

MALICIOUS

PDF

74.8 KB Created: 2021-03-11 02:29:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ef1cbff12a4f5310d76b75a9a4421986 SHA-1: 386cd2ecbc4e7d253468b0a55eb23baf17666e90 SHA-256: 08cf7fa4dc291d70b7bc3840a9909d7e67e480f354790e919b1979ef0af48a4e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9996

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://zajinet.ru/award?keyword=belajar+vlookup+dan+hlookup+excel+2020+pdf PDF link annotation
    • https://barobinamad.weebly.com/uploads/1/3/4/7/134756413/babewokodig.pdfIn PDF document text
    • http://zopokujejisolan.getenjoyment.net/10544734744.pdfIn PDF document text
    • https://fulojexerewo.weebly.com/uploads/1/3/5/3/135345176/tutapilizem.pdfIn PDF document text
    • https://janejamav.weebly.com/uploads/1/3/4/8/134887015/sufiduwan-mudiradivobezun-galupenavu-rowuk.pdfIn PDF document text
    • https://jimekijan.weebly.com/uploads/1/3/2/8/132815057/1877201.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/pewuseseku.pdfIn PDF document text
    • https://gofupadosu.weebly.com/uploads/1/3/4/8/134853885/vikozet.pdfIn PDF document text
    • http://xazivigufimu.22web.org/anamnesis_psikiatri_adalah.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/vunexixakefik.pdfIn PDF document text
    • http://jurogiriwizezaw.22web.org/27530213400.pdfIn PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/240942.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_12128ecf17224d39a42a96fc63229292.pdf?index=trueIn PDF document text
    • http://benuniwutaferaz.epizy.com/kutigezinodusexud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8c41eca-fbac-4516-831b-bfdea5d91369/64677793384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5b2aa13-ad84-47ca-a222-396f899ba643/fifty_shades_darker_soundtrack_lyrics.pdfIn PDF document text
    • http://fepapasofefo.epizy.com/5802080279.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_01c9125dfa4747ce8e91ce5b00ce0cf0.pdf?index=trueIn PDF document text
    • https://3e021c9a-284a-4c54-9ba1-f6d43d4d2ba5.filesusr.com/ugd/a619af_79ffee9dbb1c4d6ba7562b57bf5e3f77.pdf?index=trueIn PDF document text
    • http://tediguku.atwebpages.com/viniwikunurovam.pdfIn PDF document text
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_cfa8b09a999e41509d1373a5801cb76e.pdf?index=trueIn PDF document text
    • http://legopolo.rf.gd/how_to_replace_a_badger_500_garbage_disposal.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_off0000e5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5EC 5656 bytes
SHA-256: 29e57ced51551b994c8da2f0df8d0603b646df6872f43e97aa216e607c18ddfc
font_01_sfnt_off0000f93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93E 10552 bytes
SHA-256: 51f724cf7671d296ba60f2b3cc70620f4139058092d0574dd798b6e7755f7e5b

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