Malicious PDF — malware analysis report

Static analysis result for SHA-256 47afe6f0893d9c76…

MALICIOUS

PDF

74.3 KB Created: 2021-09-13 21:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: b21f729c489df2bf4d6d364272381f7a SHA-1: 115311bc078bca147fd6c96734a0beb26046de7c SHA-256: 47afe6f0893d9c76f87f81c8da39339a15b12ad71727b6f97a3446d7afb3a6e6
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 0.9980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://stl-log.com/htdocs/cljr/data/files/22318168940.pdf In PDF document text
    • https://drddvichitra.com/userfiles/file/patiruzasonamebe.pdfIn PDF document text
    • http://mariancozma.com/_user/file/puwuvogederigulutewekab.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/39243646884.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202109101644488239.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/kufiwidolowa.pdfIn PDF document text
    • http://supragyn.cz/userfiles/file/78504088740.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/gosulalaxiribulapegamur.pdfIn PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/96877797042.pdfIn PDF document text
    • http://jmk.kr/ckfinder/userfiles/files/85244838296.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/sepukuwijedapaxutapele.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/96567221599.pdfIn PDF document text
    • http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/97556385503.pdfIn PDF document text
    • http://spodne-pradlo-2bpoint.sk/UserFiles/File/vifarolowukekesubenu.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/tejamunukiloxo.pdfIn PDF document text
    • http://hftyby.com/upload_fck/file/2021-9-3/20210903094340685053.pdfIn PDF document text
    • http://cjatkinson.com/userimages/rasirinorufijaxipiwomete.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/38624259063.pdfIn PDF document text
    • http://kleinschadenexpert.de/userfiles/file/74744674797.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/luloxasisowawevu.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/11685472286.pdfIn PDF document text
    • http://123flower.doweb.kr/upload/files/kodanaxeroropeputu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=twenty+love+poems+and+a+song+of+despair+in+spanish+pdfPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB79 17704 bytes
SHA-256: fdc8e82482d156ead8c493abf25e6b6c6fff8c6d47b2dda582b4ffabd9fa03b0
font_01_sfnt_off0000e8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E3 11172 bytes
SHA-256: c9d757036317e8f59c1494012c2e46bff36066d93b00193879aba419395dd1c8

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