Malicious PDF — malware analysis report

Static analysis result for SHA-256 12496054158c6678…

MALICIOUS

PDF

77.3 KB Created: 2021-09-11 12:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 8713e4e8ae9f3a28184cdd09e65a7671 SHA-1: 0b8d0ef7e232a2c9e7b0776c815c6eae716fa8c9 SHA-256: 12496054158c6678e499dddbdf3c7ea2d0f517603d44e8a084a0f7e6946ab4de
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://baracenter.be/userfiles/file/zamoviridomiv.pdf In PDF document text
    • http://realcomfort.ru/content/upload/file/3905532575.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/vejutafeguwovufe.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/55030570141.pdfIn PDF document text
    • http://primaria-ciocirlia.ro/media/file/ruzixibivuxarek.pdfIn PDF document text
    • https://mallncart.com/userfiles/files/63632384002.pdfIn PDF document text
    • https://xn--80aaa1arbfjoe3bzh.xn--p1ai/data/files/92794158192.pdfIn PDF document text
    • https://airbays.com/userfiles/file/15667773421.pdfIn PDF document text
    • http://hk-keber.de/images/file/49572146547.pdfIn PDF document text
    • https://iskoruma.com/upload/ckfinder/files/zagizuvudipenewi.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/xesajofapujujumekex.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.excore.hu/ckfinder/userfiles/files/8639131769.pdfIn PDF document text
    • https://tonerihned.cz/userfiles/file/mewekokovegi.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/dapuvizi.pdfIn PDF document text
    • https://alaskaproauto.net/nbloom/fckuploads/file/mogugudujezamud.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/48826943138.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/41303714357.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/20083385725.pdfIn PDF document text
    • http://full814.com/upload/files/juvepamefafokali.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/42841323375.pdfIn PDF document text
    • https://memorybg.net/app/templates/js/ckfinder/userfiles/files/38471949305.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/99818175484.pdfIn PDF document text
    • http://seksdagen.nl/userfiles/file/vigivakutepokulinobilel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=www+gta+v+apkPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE414 9904 bytes
SHA-256: 93cb7b7a2a163f12a8231d4e18f86e4c3b1382369deb9d0781dac934ae204ff7
font_02_sfnt_off0000fa14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA14 17072 bytes
SHA-256: 65663b41d684beeeacc15e7c21db078be3b630f5953855b0e1c798b1eadb6cf2

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