Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9f5ddf4f035685…

MALICIOUS

PDF

106.2 KB Created: 2021-03-23 01:50:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e7a72aedd353d45dde07f52cd29f55fb SHA-1: 2027a00c7cc80eaf8c2090549b74ecc00f01e26d SHA-256: bb9f5ddf4f0356857b11fc898132196c70cbbf5f55815300afd1996b4c3b7d8c
126 Risk Score

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 0.9993

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://crophysi.ru/strik?utm_term=is+catholicism+the+oldest+form+of+christianity PDF link annotation
    • http://creditreportusa.info/80315131547qym0u.pdfIn PDF document text
    • http://dithetsen.xyz/the_martian_movie_worksheetzx6gl.pdfIn PDF document text
    • http://just-gopro.com/sitemi1jgw1.pdfIn PDF document text
    • https://pinagoremomaj.weebly.com/uploads/1/3/0/7/130738806/621d57ade3.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/fapanis.pdfIn PDF document text
    • http://powerpoint4you.ru/48128257289ad83q.pdfIn PDF document text
    • http://pumba.fun/gufakasonibukotovokonahp7zx.pdfIn PDF document text
    • https://sadavixiji.weebly.com/uploads/1/3/5/3/135333995/8274709.pdfIn PDF document text
    • http://mamajan.space/luzor7kzz5.pdfIn PDF document text
    • http://laulu-go.ru/201861102688msjb.pdfIn PDF document text
    • http://jekefidaz.mygamesonline.org/kepusorawixigakojemo.pdfIn PDF document text
    • http://pochta-24.cc/polaris_rzr_1000_4_seater_lengthnqj99.pdfIn PDF document text
    • http://allostar.buzz/bavuxabogelanobubeduojs0s.pdfIn PDF document text
    • http://sexedate69.site/bioplastic_manufacturing_processmr6cy.pdfIn PDF document text
    • http://bugilinupapud.mygamesonline.org/4001487789.pdfIn PDF document text
    • http://investorlands.ru/866708468lpq9p.pdfIn PDF document text
    • https://mupimafab.weebly.com/uploads/1/3/4/7/134728659/8644591.pdfIn PDF document text
    • https://kamidosebesu.weebly.com/uploads/1/3/4/5/134593467/digoxesegij_nezogonegireto_wuligevi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0a3880f2-9bda-4900-b484-73a003b8a878.filesusr.com/ugd/3cbe5d_0c7ae69eb5eb4f0e9ae88cad57b9e12b.pdf?index=trueIn PDF document text
    • http://sivikonalijuto.myartsonline.com/million_dollar_consulting_proposals.pdfIn PDF document text
    • http://zonatitusajobo.onlinewebshop.net/kadefowemo.pdfIn PDF document text
    • https://443275ec-395d-4f86-84c9-2ed7a250e117.filesusr.com/ugd/7d471d_17692b0b3bd24bdeaf750ec4ccd5215b.pdf?index=trueIn PDF document text
    • https://c245485c-e1a4-4c5a-9a2a-c465a95e53c8.filesusr.com/ugd/25f824_47302aeee51148eaa762a6741c0853aa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001621f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1621F 5300 bytes
SHA-256: ea4cdee69c5c37f10ad6ad4aef6888f6f9375f1c5be2480f59279a1302eefaba
font_01_sfnt_off00017402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17402 11452 bytes
SHA-256: 6f5b29531cf37f8a55f1e05d50c1dbea35207409864229b57165daae63397c36

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