Malicious PDF — malware analysis report

Static analysis result for SHA-256 db506902666d59f6…

MALICIOUS

PDF

125.2 KB Created: 2021-08-09 03:53:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 323ca0542d0f4b631d1d3a460a298cc3 SHA-1: 19646c2559118c870d8f821d61e8ca415630cdf5 SHA-256: db506902666d59f6dcda9aae86143d056c38f4b809564e0ce6e34321d7221157
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to distribute traffic or host malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly indicated maliciousness. The document body is unreadable, but the heuristics and URL analysis point towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cd1b18cee11---22696521653.pdf In PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160794a65374d2---495439559.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/55304300609.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/c68925214a4cab05b2306e1dc226447c/xowagirog.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/votezobar.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/88389015636.pdfIn PDF document text
    • http://wearebryants.com/clients/3/3b/3bb22ab34fb8fe691aabc4d0498f9caa/File/pabalapalifaguredi.pdfIn PDF document text
    • https://agmatbaa.com/upload/files/wulokizutopizipele.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/aapr655u62dmjkov4i57jou5cf/gidetifuxisunotive.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/3a7nu4uhfce6lu12bub5i96661/27029675811.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/2l64evpcvfabjsejvsg0qiqce7/22614091790.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079db6517421---85985791699.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607216c97afce---paraxirusikigawipomupovel.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/ff99a1f24dba9abb7ab30b982ae222aa/jumujumigodugekan.pdfIn PDF document text
    • https://tourpon.kr/FileData/ckfinder/files/20210616_E2E3C92186E683E8.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/57231648243.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/376uct66grslr3ghbh3kdtr1k6/83056566013.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16084d5e8d816c---3061505388.pdfIn PDF document text
    • http://luingpyrex.cz/foto/Image/file/97427461924.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/3b6788b0229de9362070ad1cdd4fd032/zamupevutajidilelarolu.pdfIn PDF document text
    • https://peterdegendt.be/file/mijetovuzonekuvopidogafo.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/17451518156.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=nombres+de+personajes+de+la+era+del+hielo+3PDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/a7ceee253d7c4cecb7502dfc849587df/kerisubojizavobavisixadu.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_off000180ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180AD 19728 bytes
SHA-256: 2f296674de5a18fc767fb962a9ecfe7b06e2613b7732167f61e75f9090743e6b
font_01_sfnt_off0001b2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001cacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CACB 10980 bytes
SHA-256: ceae6cbea78d97218f31eb69066070ffd0abcbe2bc14ba682eb2f1dba55432f4

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