Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9668bdd5bcef0ff…

MALICIOUS

PDF

90.8 KB Created: 2021-06-26 04:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 42badc48bbbb8fd56428828bb8939e2b SHA-1: b574e72836f806ba771b13c4275376d1d98c1099 SHA-256: f9668bdd5bcef0fff1710d506143094e6b97c9c12cae0c667845f966fd17fb99
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, suggesting it is used as a link farm to redirect users to malicious content. The file's structure and the nature of the URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a56ef0fee2---59354639391.pdf In PDF document text
    • https://bamor.org/userfiles/file/jinar.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/zowanojikidorakuvuvixo.pdfIn PDF document text
    • http://hsound.ro/images/custom/file/97944875846.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/ebi2fe633ejud06b8d8016hne6/sovujalibofa.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/2e945ed1fefe655794ad505aaeca54c5/73749689995.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/70476979378.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/fe5de9b0fef925cd6f3dcc442b62b439/gemoridu.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd0f6446c4---nunolumajugogoxedoni.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210609120651.pdfIn PDF document text
    • http://hphs1958reunion.com/clients/47465/File/gakik.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/1ujld6tgr26um62bmpaqor0v1c/bifiwolobitatemezitasape.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/rewuw.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b849c1a2aa---gelazilutuximetomex.pdfIn PDF document text
    • https://ikima.fr/uploads/file/jumuk.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ae23a2bf73297cfe99a6788d5c91d3be/821559702.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/ff14b1aeaf39bd2223664f0e04ff55c0/48892351276.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/bca44a87559e2f25f7b77f3cd046bcf2/94872497443.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/25262950113.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160beb09c40333---84189733767.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f94e0c4c8f---60771940381.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160774cd58574c---kabudexafuzad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=verb+to+be+games+for+kidsPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001168b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168B 18600 bytes
SHA-256: 6536e8f2c55748448a8105331b2f8e5cbcc331fbb102da9b0cac71f15ef9bcd0
font_02_sfnt_off000145c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145C8 10748 bytes
SHA-256: 57b01ec9aa4843cc31fedf8897cab1f75777ab0f4c52a284be6ea24b7b2cf53d

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