Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf6120d18b9744d…

MALICIOUS

PDF

99.8 KB Created: 2021-07-06 19:24:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d719b979355ad587270d79486800cf8b SHA-1: 142a30db6e0d898ba88b86043ed8e35e32e174d8 SHA-256: 0cf6120d18b9744d3f33645bcfadbde7913cd63dda4a3eb9c0164c2175417056
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly suggests a phishing or credential harvesting scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://crysiq.ru/uplcv?utm_term=blank+tugboat+that+saves+distressed+ships PDF link annotation
    • http://olsztyntransportmedyczny.pl/userfiles/file/bigame.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/42806889081.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/838b5fe19fdae117423e81a278bd94b6/84906743856.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6ac41e6bd2aeeb34b91e1ad84eaf3ad2/ninuzidowizojufedowiko.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/3d6be70a9bf47fe3771ad3f20e5bdb80/22667165239.pdfIn PDF document text
    • http://wujipacking.tw/upload/files/jotutopapanozovuzegir.pdfIn PDF document text
    • http://sh-ruiyangcpa.com/userfiles/file/2021-6///2021611143165060.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/vutusigabulos.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf5de173b7---84148106501.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c56cfb506c4---mugimozosunumogowudux.pdfIn PDF document text
    • https://saam.vn/images/content/file/16378792238.pdfIn PDF document text
    • https://btegypt.comfile/59316784486.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/f6a1e89a4246b07f4b19b9fc0e962d9a/xubewukasoxomonaka.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099801dbd6ca---84492811684.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/7d0f37f2de6730cf8726539649bb9492/tunawejoli.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/97160121199.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/79420560947.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/63387722190.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/lejovanawesikugopip.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/7lmbjhq1qd2o859faid0sbv5a5/nemiwimovuvodunaviregif.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f9d6aba14---54917572621.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/1oip4ttonsjr46hjv8d1hh4mec/70671252892.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e74bd37668---32222176273.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13812 11124 bytes
SHA-256: a4b797252e9469bc7a861341eab89c71a31da0e734247bf0292bedd1d36d53d3
font_02_sfnt_off00015197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15197 18440 bytes
SHA-256: 7f24c571bf4648cfb00d3f7030bbb970ac59cfa5acf1b1a76cef3afa0950efcf

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