Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd42eb1d8c5906cc…

MALICIOUS

PDF

87.7 KB Created: 2021-09-18 07:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e9255a3b69cfac22ab999a8e61a949c9 SHA-1: ed10126d8c3c65373410f62c56ff53ad10243202 SHA-256: fd42eb1d8c5906ccfe293e3f768f715e874b7712e88461169e83ca24b299e489
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://huntic.ru/uplcv?utm_term=gps+joystick+old+version PDF link annotation
    • http://amongelite.com/ci/userfiles/files/56574237723.pdfIn PDF document text
    • https://fgcrubochi.com.ng/ckfinder/userfiles/files/bigaz.pdfIn PDF document text
    • https://datajournonepal.org/files/tididusinisekojaker.pdfIn PDF document text
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/virivowusodojolemup.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/94462803929.pdfIn PDF document text
    • http://limobebe.com/userfiles/files/46192053997.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/paponuwod.pdfIn PDF document text
    • http://solentpodiatry.com/jackvl940/web/content/images_uploaded/file/sonobafaxakuzozigokepi.pdfIn PDF document text
    • http://form4concrete.ru/pics/cont/file/fariweposeseb.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/85910182585.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/29355907074.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/73731026942.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613397ca90fd2---1223506655.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/nujawidokasoviwerulagawuf.pdfIn PDF document text
    • http://olgapolyakova.de/files/files/xipemuvutexetu.pdfIn PDF document text
    • http://arcadia-fitness.es/userfiles/file/bofivigazonokase.pdfIn PDF document text
    • http://plenaseguroseprevidencia.com/fotosempresa/files/35441045333.pdfIn PDF document text
    • http://uhorder.com/upload/files/70765586090.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/mifinanujoginaxazunabebi.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/zisewisexedejogaliwut.pdfIn PDF document text
    • https://xnkvinatimex.com/uploads/files/72670155772.pdfIn PDF document text
    • https://qualitygums.com/userfiles/file/560401414.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://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_off0000edd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD7 19348 bytes
SHA-256: de1b07f4cae2330879e46fc9baba54f0f2fd8358ad968b7485559ef653792b03
font_01_sfnt_off00012070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12070 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13887 10788 bytes
SHA-256: bd282a66e7ee6fe022651b988ef64eafc0cacb86becc0dc8fdc02216b4aad656

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