Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2993586a860f106…

MALICIOUS

PDF

75.9 KB Created: 2021-03-08 08:34:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 137f57529d392530f436edbee4419e05 SHA-1: 1106f423c1a72c405304137148f2b7a26fd78611 SHA-256: e2993586a860f106374a3729d8b05285786bb071aa3aeeb7b29acc44976e1e2f
186 Risk Score

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 0.9998

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://jumiwimov.ru/strik?utm_term=dog+man+fetch+22+hardcover PDF link annotation
    • https://cdn.sqhk.co/mikevoponage/jcgmjcs/viral_whatsapp_status_videos.pdfIn PDF document text
    • http://zunejabilake.22web.org/turbochef_oven_f3_mag_curr_error.pdfIn PDF document text
    • http://laribij.scienceontheweb.net/schwinn_bike_trailer_attachment_canadian_tire.pdfIn PDF document text
    • https://wilowukodol.weebly.com/uploads/1/3/4/8/134881933/518654.pdfIn PDF document text
    • https://bituxomixa.weebly.com/uploads/1/3/4/1/134131270/moguziwarerik.pdfIn PDF document text
    • https://waguxezemi.weebly.com/uploads/1/3/4/7/134703223/lonuravurabepe.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/iiBGgj0/96028407252.pdfIn PDF document text
    • http://gakivako.iblogger.org/dixovabugigirubulowiwur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_2b8bbe31be814b89a1aa3b3a27cbeccd.pdf?index=trueIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_d5783d44353b48a8bd6019608aa37f02.pdf?index=trueIn PDF document text
    • https://0926596c-b1e6-4473-87d6-fed2e709bfeb.filesusr.com/ugd/e2a635_43ae8878cc614ae598b85da0e2fdaf1e.pdf?index=trueIn PDF document text
    • http://jedenibiripo.epizy.com/jakipasuwonideza.pdfIn PDF document text
    • https://fab88ded-2f12-46c9-b6ec-f290036286cc.filesusr.com/ugd/cce69c_001c7f6884854e87a82daaaffc064b68.pdf?index=trueIn PDF document text
    • http://mifojizu.myartsonline.com/boxukuzaj.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/tabapaper.pdfIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_cff82bd199f24a8180e3a09f081e06d6.pdf?index=trueIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_ba6adf6d37484867a18ad26746f7b870.pdf?index=trueIn PDF document text
    • http://kilubediboxut.rf.gd/84529417921.pdfIn PDF document text
    • http://mavoweba.epizy.com/lifajelaf.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_off0000eaf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF1 5416 bytes
SHA-256: 8c60b209fa7a4d560ad4b5fa582477ccafcf8110456db7063d1981429d5bf5b9
font_01_sfnt_off0000fd46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD46 10908 bytes
SHA-256: 4c1f38a87e8bdd55da890604200838f54fd11007ddec369a7a0d5c953e24a874

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