Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01a12b529d89816…

MALICIOUS

PDF

71.2 KB Created: 2021-09-17 06:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c2c27cbb8120b6640d65246a713d8e5a SHA-1: bdc47e926950c9fb45168743e149abbd9baa2917 SHA-256: d01a12b529d89816303f0ec87cfe94b10d1bad8cb92080e0c2e8219fe3cd35ca
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to a link farm hosted on disposable domains, designed to trick users into downloading further malicious content. The presence of a visual download button heuristic further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://archism.ru/uplcv?utm_term=vsdc+download+for+pc+windows+10 PDF link annotation
    • http://synphabase.ch/upload/file/74772723247.pdfIn PDF document text
    • http://suncitygroup.ir/basefile/suncitygroupir/files/74792295579.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/wipaxoti.pdfIn PDF document text
    • http://www.medic-pneumolog.ro/fisiere/file/62511291184.pdfIn PDF document text
    • https://ckmandarin.com/uploads/nodiwasosavif.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/161339e1160654---pogofiweg.pdfIn PDF document text
    • https://skillmapmagazine.com/ckfinder/userfiles/files/jagusewijotu.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/89591924477.pdfIn PDF document text
    • http://riph.pl/userfiles/file/xipomudojoxetikuke.pdfIn PDF document text
    • http://selidbe-beograd.info/files/73274005729.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20210917081054.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/fuzozep.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d784cd9d23---49871864143.pdfIn PDF document text
    • https://mahae.hu/files/files/vifefaxewo.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/19576988969.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/jowovelulagalivose.pdfIn PDF document text
    • http://matrix-corporation.com/upfiles/editor/files/dexekabiwo.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/bafinedisalegufun.pdfIn PDF document text
    • https://porfic.com/fotos/file/minadujavu.pdfIn PDF document text
    • http://sartor.ru/upload/files/42355845939.pdfIn PDF document text
    • http://isotope3.pm-ural.com/uploads/files/11716102275.pdfIn PDF document text
    • http://dallard.fr/ressource/site-image/files/foxaditodotuvaludofe.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_off0000b590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB590 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA2 16140 bytes
SHA-256: 4781bf05eb3d7b6b4b791ba81d49b8f545bafe1616236f91d2ef90dbdebe83fa
font_02_sfnt_off0000f6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FA 10612 bytes
SHA-256: beafa9df0646d4b484ecde333dc8f6a93391f606bdea0ea79f44fa601150d18c

Open this report in the interactive analyzer, or submit your own file for analysis.