Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd9b7f6b9d4d069c…

MALICIOUS

PDF

109.8 KB Created: 2021-07-23 14:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1eac975e9fd86bbf54883ee36ba7105c SHA-1: 67b75e615de49cd64d8c2a38674b0f9a4502df7e SHA-256: fd9b7f6b9d4d069c3c3af54700b379ba037a5298ec95f8247c3afbf841a261e7
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised websites and disposable hosting, suggesting a link farm or phishing lure. The presence of multiple external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a pattern of directing users to potentially harmful or misleading content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://pogotowienaukowe.com/Upload/file/42208064237.pdf In PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/39f575280c6bca9729fd30a41736e2ab/46258135336.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7b78b7445---93483001440.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/xewufipajifawifuzanag.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/85308715408.pdfIn PDF document text
    • https://turkuazhost.com/calisma2/files/uploads/62884630063.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c48ea37e4a4---75293560475.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757bdd275a8---sugotoposanodedosunos.pdfIn PDF document text
    • http://pitchdecor-construction.com/user_img/files/22251904664.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a893f6a77f---raninenutedesafi.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b69ec4708---bitefapedagex.pdfIn PDF document text
    • http://toonesk.com/upload/80965626972.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/iohfjj752akjd3vkp007mbmke4/75757407572.pdfIn PDF document text
    • http://georgewongdesign.com/gwd/upload/files/17533379564.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/faxapomapafulabolifogebix.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/17433456537.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd954eaaab4---mufalinapirotut.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/jigebavuzunowepil.pdfIn PDF document text
    • http://tfforming.ru/d/files/wofetovowusife.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1610b0e6b9---42451319599.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0ee819413---93025419643.pdfIn PDF document text
    • http://www.mmalappeenranta.com/tiedostot/files/vebapoxaju.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/93724100582.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=nanatsu+no+taizai+movie+tenkuu+no+torawarebito+sub+indo+full+moviePDF 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
stream_005_off00011a5f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11A5F 19732 bytes
SHA-256: 8aeaa5baf459cd663d8bbbf3bb0d4dda476342b4b2ea3ed9edc16913ec882912
font_00_sfnt_off0001024e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B07 25816 bytes
SHA-256: 25f927cf15c95805ef512306b9d69cc1f310afecae89d8a1b8606930325f17f3
font_03_sfnt_off00017a4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A4E 11036 bytes
SHA-256: c21c82b62ac85dad90a8524155eb45b0153ac689747e8ee62339ba8d3ef778d7
font_04_sfnt_off00019410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19410 4448 bytes
SHA-256: f6a313b35c5b71dd555f7e8eb53316a54d28d395400f25e4977dfaade00ed97e

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