Malicious PDF — malware analysis report

Static analysis result for SHA-256 433c4f165d086378…

MALICIOUS

PDF

96.6 KB Created: 2021-07-01 21:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 421acd7570975f76c640e98ea37cfa88 SHA-1: 56c316701b81b8c39b2dbf4bf32e95fd47d68290 SHA-256: 433c4f165d08637847fc15248f71858aa49e96fa3b5a6b06df37132f493e70a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised websites, likely intended to lure users into downloading further malicious payloads or visiting phishing sites. No scripts were extracted, but the PDF structure and URL patterns suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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 http://speakingaboutnetworking.com/ckfinder/userfiles/files/70117895622.pdf In PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/kuaovit6mtalf7hc25je60srpu/fuzolojevilasekenulive.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c033dba41---lifikutolofutiku.pdfIn PDF document text
    • http://debden.org/userfiles/file/vaxetejo.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608484ca66d89---37672103630.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bdecb974d---47965026564.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/klmi5d5arki5isfaph1k06o0gk/solofidusudegaluso.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/l33nf51u5ev73sqtnu66h0jfia/lupiw.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c38cd466---rawovogovenisap.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/quvjgh0avor1rhsl9equ8taikn/kujofujalo.pdfIn PDF document text
    • https://bnovum.hu/downloads/ranapo.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/jifuse.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607182f335fe5---golanolu.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160881710eac81---gozipuzuvilijato.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c677a35886---39892377383.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/jusek.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/04566077d2c540d21fb0ec088a9a6881/vipajumasaviwuzobu.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5cc317b54---muzizesezak.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160860e2a02327---74147869430.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a94307b14---xawutufukawobor.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/galetoline.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608011e304109---44486382688.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=meaning+of+second+cousinPDF 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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C2 10500 bytes
SHA-256: 9d714032bcca088a36e7a2e98e1dca9f118c9af0e8b0108632aa54d6b430a393
font_01_sfnt_off0000fd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD88 17024 bytes
SHA-256: a346d268760e3faaf704e85b30f19b6df89952c7d5b8da875d75626c4334935a
font_02_sfnt_off00011665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11665 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E72 2720 bytes
SHA-256: eef6a4e11ae43c7b0678a6291a907b79d6fdc8c34241488c3fb78eb43a3e1c54
font_04_sfnt_off000139fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139FE 22804 bytes
SHA-256: fcbbc40d64e12978c81f13e95b6ea47bbfe011599bcd45b463dbdb0e6dcae637

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