Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6061c57b1397858…

MALICIOUS

PDF

70.3 KB Created: 2021-09-25 12:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c335f3d2eee5931cec023b8b68bd6966 SHA-1: 2ca6e0a893800e3a001f3068e726c9e2daf300f1 SHA-256: d6061c57b13978582eb15f3dba0e007f5de941afa5c3284c4d56aff719475b70
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on potentially disposable domains. The presence of a specific URL related to 'gta vice city cheat codes download' suggests a lure to attract users to malicious content. ClamAV detection and ML classification further support its malicious nature, indicating it's likely a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://synerhu.ru/uplcv?utm_term=gta+vice+city+cheat+codes+download+for+android
    • http://ed-web.cz/userfilesfile/parexakuto.pdf
    • https://bostoncake888.com/UserFiles/files/rutokifukodiko.pdf
    • http://claudiamelchior.it/images/file/fetupakepijeximofebivegu.pdf
    • http://nandishoverseas.com/UserFiles/File/93566413524.pdf
    • http://benetworkingpro.com/ckfinder/userfiles/files/64948249097.pdf
    • http://boathousebrokerage.com/userfiles/file/tikibis.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613adeed293db---23445202247.pdf
    • http://ferramentabelleggia.it/public/file/nusokuw.pdf
    • https://emmaushuis.org/pages/diwasajibebozaluza.pdf
    • http://quatangsongvan.com/hinhanh_fckeditor/file/jozebinosa.pdf
    • http://grandwatergatehotel.com/upfile_hotel/files/84448239751.pdf
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/sirivawabukebojabupen.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/u4nabj0cs54hkto90t3qihkdur/bimanos.pdf
    • http://trunglamdecor.com/uploads/userfiles/file/wilopedelaj.pdf
    • http://engineersclasses4competition.com/files/others/lawofizadozadiri.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142489a38112---jijamovokidolarudolujen.pdf
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/ripefulum.pdf
    • http://fsnmmaterials.com/UPFILE/userfiles/files/37581550148.pdf
    • http://dostavkaturov.ru/files/file/pazamubal.pdf
    • http://tufaghanafc.com/js/ckfinder/userfiles/files/97409282751.pdf
    • https://openkomm.yussfone-crm.com/userfiles/file/vevuti.pdf
    • https://path.mn/userfiles/files/zeraxopusaduvatabonu.pdf
    • http://taxicityplus.ru/userfiles/file/jonoxelusomisovazupasejov.pdf
    • https://rt9.rspo.org/ckfinder/userfiles/files/38092565626.pdf
    • https://easyown.ddproperty.com/datas/files/bilurabowasixedili.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3a8.bin
4c4bd57cdfdd6aed192d54056142884d2a40349a401c4df0febb5038b652bb29
pdf-font-stream PDF embedded font (sfnt) at offset 0xB3A8 10876 bytes
font_01_sfnt_off0000ccda.bin
0429c2917a1beac91c29418b9cba99d3a880185635f315b3c0ba27e277aab0ba
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDA 15072 bytes
font_02_sfnt_off0000f2d6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D6 16792 bytes