Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad705ff644aae9f7…

MALICIOUS

PDF

68.8 KB Created: 2021-09-25 15:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 9163f280add8761ae7f7e2b5730e7fa5 SHA-1: 958f0a91b99b7c3090b4f1c4557833ac7f4f4740 SHA-256: ad705ff644aae9f701108fa2bdd3a5489bda4375edd7ff66dcdf7fa96d30f1d0
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-heavy content, and embedded clickable actions pointing to external URLs. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://lgassociates.in/uploads/mugajumamuxukewunoxog.pdf In PDF document text
    • https://mashtalkandil.com/userfiles/file/nuvexajupexe.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/57493682603.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/81479321442.pdfIn PDF document text
    • https://doublehaircenter.com/upload/ckfinder/files/32709247786.pdfIn PDF document text
    • https://sunridgecorp.com/uploads/files/202109062032016179.pdfIn PDF document text
    • http://daonshop.com/files/fckeditor/file/76975462431.pdfIn PDF document text
    • http://cozycornerexpress.com/uploads/files/lanizobawesobivun.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/jolekojepepodofagilej.pdfIn PDF document text
    • http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/98131207252.pdfIn PDF document text
    • http://ortosprendimai.lt/userfiles/file/22782074766.pdfIn PDF document text
    • http://cnsgafgl.netsociality.com/upload/files/woniwibimexitoru.pdfIn PDF document text
    • http://zenkatsu.dk/files/pavamifawofogegenagevised.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210907044328.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/24941909888.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613598f92bbd4---65244169946.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/bugugimujexakutiri.pdfIn PDF document text
    • http://scsytech.com/upload/files/44360923521.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/mufubagobigozigetozaf.pdfIn PDF document text
    • https://artesapanaderia.xyz/aym_image/files/tuwopivaronumub.pdfIn PDF document text
    • http://runnersavezzano.it/public/userfiles/file/sigetowunotepul.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/952cc7c9a15244219edc56a9a4fa11bb/98526438109.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/20534556795.pdfIn PDF document text
    • https://gogift-it.com/userfiles/files/92623651706.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=dragon+ball+all+episodes+in+orderPDF 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_off0000b2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000caea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEA 10608 bytes
SHA-256: bc3cfba90226f312179fcb30e87639be873f98d19590b6cdf85fe56c6d136104
font_02_sfnt_off0000e2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BD 13976 bytes
SHA-256: c2a7473deadbdcb3b5d8ef20269192ec87ba1f4dbda5dccf8fb90f5bb4d91a70