Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a59961d605f3b8…

MALICIOUS

PDF

78.4 KB Created: 2021-09-13 07:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: bd846057233c34a5bc32355eef797692 SHA-1: 929f76fa7305a315097652654bfce27967583f04 SHA-256: 46a59961d605f3b84fb79db6c3147bd708c29a768e4e24949e3533005b510f4f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://crysiq.ru/uplcv?utm_term=world+of+warships+download+android PDF link annotation
    • http://mvpbuilding.com/userfiles/file/21287433929.pdfIn PDF document text
    • https://h16hr15k-h19hr37urn.com/contents/files/lipozabepunizoxozure.pdfIn PDF document text
    • http://garankuccu.com/upload/fckimagesfile/af3bd3966a80887846bd26484f758f23.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/7061000681.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/lubanutako.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/83976364828.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210908_120050.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/5a87ffce4cf95c050417add001a87c11/gurodaketixowiri.pdfIn PDF document text
    • https://pmms-online.com/assets/file/gatipikitisalisano.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/mutotulutotesixemokilozi.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/17275288580.pdfIn PDF document text
    • https://nepaltrekkinginhimalaya.com/assets/userfiles/files/jopifufumikiwefejolej.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/xetexipodalikujesubapizij.pdfIn PDF document text
    • http://belloverde.net/emailer/file/60069690013.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/mezomus.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/jetezonepoluk.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/83409305342.pdfIn PDF document text
    • http://geose.ru/userfiles/file/tuvivaxamelisibugogutuxop.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/161346c5c59798---dekonijijuwomanipagi.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/47410966107.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/10358920906.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/41309958410.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/gotokazafupimiwetokolaf.pdfPDF 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_off0000cdec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FE 17924 bytes
SHA-256: a133ca0f42c701f94a4a1cb886ce7476b32aae2f9f9dfb796632ff105e382983
font_02_sfnt_off0001144d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144D 10444 bytes
SHA-256: f1689faeb62e0521c454f91475834903d30b93cad437cb661b801a24f65926b6