Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad2c10222d81792…

MALICIOUS

PDF

83.9 KB Created: 2021-09-10 13:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 81128e2b7b2cc49251f7ac28d6a1e0c9 SHA-1: 7c64bfaf69a7a31120b4f39012147264af4a0efc SHA-256: 2ad2c10222d8179265f448153c9c2c2825eb4b7f80d0ca74bd29008cfabd402d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many of which point to disposable domains or link farms, strongly suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of numerous external links indicates an intent to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=android+wear+phone+call PDF link annotation
    • http://geostudio.eu/userfiles/files/luxosetosekajudome.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350a6c51348---18500212738.pdfIn PDF document text
    • http://sprinter-lab.ru/content/File/6976536992.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/gurog.pdfIn PDF document text
    • http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/34454618589.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/31070954286.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/1725569020.pdfIn PDF document text
    • https://emotionalgift.youngzonejewelry.com/ckfinder/userfiles/files/dovavurutibomegupax.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/nazovekarepevibegitoko.pdfIn PDF document text
    • http://kieryk.pl/img/userfiles/file/gujiwasabikunudumazuposad.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/5278192748.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/ruvafokedakoregaluwiteno.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/78310112597.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/85617543822.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/betam.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135dca5a3b73---lonukefagamup.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/22364179113.pdfIn PDF document text
    • http://aurangabadptti.com/ckeditor/ckfinder/userfiles/files/norowaxovipajirokefix.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/73594475007.pdfIn PDF document text
    • https://valgott.com/images/userfiles/file/40928008930.pdfIn PDF document text
    • http://kdbelektrotechniek.nl/uploads/file/65220392030.pdfIn PDF document text
    • http://nanumed.ro/uploads/files/wixodimonunakezuz.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/19887174446.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_off0000e245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE245 18288 bytes
SHA-256: d3306c2a5d4301422044d5a86701895b9bc06eb1edd24360d15833590e2a7b02
font_01_sfnt_off00011200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11200 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A17 10412 bytes
SHA-256: 1d5dde61707cab2c774620640f5f4d14a3d94298b291591803be4f7f8afe83e1