Malicious PDF — malware analysis report

Static analysis result for SHA-256 3812faa7045653a4…

MALICIOUS

PDF

92.3 KB Created: 2021-03-24 20:52:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 81444001797217f8e7a8c6149aeab0b4 SHA-1: 71a1da0c98fe8538174cdb89186bd9ee79771f7d SHA-256: 3812faa7045653a4a0cd349b19417a87919f8bad73dbe5bcfac7424b76831f7a
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 0.9996

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://kuzutuzo.ru/wix?keyword=mlb+9+innings+2019+apk PDF link annotation
    • http://lexanizisujufum.66ghz.com/dark_souls_remastered_ps4_trophy_guide.pdfIn PDF document text
    • http://supfitket.buzz/91354333004tr4k5.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/illinois_corporate_annual_report_form.pdfIn PDF document text
    • http://leporabev.mywebcommunity.org/99317330184.pdfIn PDF document text
    • http://pexiwaz.iblogger.org/total_conquest_hack_java.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405181/normal_5fda66df4a96e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500186/normal_6032beee8ab0c.pdfIn PDF document text
    • http://tapodozinojet.mypressonline.com/67792480960.pdfIn PDF document text
    • http://tideparipawovu.mygamesonline.org/puxanogeriti.pdfIn PDF document text
    • http://xelamoxadavas.mywebcommunity.org/pelubajoverigagevepuwabo.pdfIn PDF document text
    • http://livetajo.22web.org/bizeponagadaxiti.pdfIn PDF document text
    • http://idealicaitaly-ufficiale.site/torilowuzid3jkt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487623/normal_5fe1503616301.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_fdfda717dfad4ae7bdf58261903006a1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea112edc-15a3-4461-97c6-ea8ac67801ac/millermatic_135_owners_manual.pdfIn PDF document text
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_5f3da61d49a8465cbc84f75b8a9ed024.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/788830bc-1a97-4939-aa89-730a41a5a5ed/how_do_the_ribosomes_and_golgi_work_together.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_off0000ffbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBE 5684 bytes
SHA-256: e7fb6978b116b9a41c2d951e278c94693a5a2054bb069c0e102e53000b7affe2
font_01_sfnt_off00011399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11399 5580 bytes
SHA-256: 72d61ff454bd7fbaf12050547dff55e1c3c4c8a243eb7c28b0f0bb6d7af38cf8
font_02_sfnt_off000126b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B9 11408 bytes
SHA-256: 366a26e1c0747670adcb673ea178bfc21c3a351b1e32d3275f25733fb720314e
font_03_sfnt_off00014d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D8A 16420 bytes
SHA-256: 228d3b2238d6456e04bad35679dc0412ecb333df9b33bd32d98d7261f6fb4b95

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