Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f0ccadf234fc2b9…

MALICIOUS

PDF

83.0 KB Created: 2021-08-07 18:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 35e1c2803835f5c5723c663ce1d8b645 SHA-1: faedf13edb77f883e2c5f3c02546583a1978a7d6 SHA-256: 7f0ccadf234fc2b961495496545251d9251f064693c5eeaef9b51475a20ea505
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links strongly indicate an attempt to lure victims to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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
  • 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.
  • 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=guion+de+radio+sobre+la+contaminacion PDF link annotation
    • http://myphamlulanjina.com/upload/files/65469675623.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16074960eab4ba---lagaxovepotagubewofe.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/bosurupudep.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/jofejozuwabave.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/95b7619ee635b3be75fc19833f45699c/mafiwujujofenov.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/48663799273.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name//files/ralevoduvusat.pdfIn PDF document text
    • http://scoutpate.com/userfiles/file/72458282365.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/56002187083.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab35bb7c816---jizejonalakutovo.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/88405212388.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/fpfs28vu54brjhuvtn00h9ld3a/rijimodesuduxosejidasiw.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/808833edc6e372c99a2e4c15695ca280/nimeruguxowexabub.pdfIn PDF document text
    • https://petala.gr/userfiles/file/xaredasupid.pdfIn PDF document text
    • https://peptidturkiye.com/ckfinder/userfiles/files/7965108784.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/80339389895.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/nebopotixutuv.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/7347b3cf0bcafceb8e47eb2964c5cc3e/pewakuwonoxawu.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/vb3j1bn620q2hkglbakeg0a546/vetupidasukofakaravipi.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/bn6cl98652l1cadc8g4mt6a63a/sazutumuxozusudatokiwe.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/c9e9c569413ec5d7d8ebfb1993556978/wanurovasiniwurosawamago.pdfIn PDF document text
    • https://wita.lt/images/files/xovabakawupuvib.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16088f63ca85ce---fodojowapa.pdfIn PDF document text
    • http://mamnonsaokhue.vn/app/webroot/files/ckfinder/files/52464566852.pdfIn PDF document text
    • http://haai.org/upload/file/mujagowigulaloroxez.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/161057e0949932---liwirixa.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_off0000dd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD12 10808 bytes
SHA-256: 3a8e30f7156f65db129c0856e1a07ede84c4455c26f573a211e8e5aa1119704b
font_01_sfnt_off0000f5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E10 17952 bytes
SHA-256: 19d67908de88e976a5675fc36c0d34b199c00d73a60801a320cd1cb3edd49949

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