Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b560d62df77010c…

MALICIOUS

PDF

93.4 KB Created: 2021-08-13 17:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 61a90f853faee7cbb5a60e77253045e9 SHA-1: 9472ef91540ecfca6c2f8ba52729c7694f9b9f83 SHA-256: 5b560d62df77010cc3ab28ec02fb1fde3c028e0fdfce8193ee747a148595bba2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a pattern of using these links for SEO manipulation or to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://queure.ru/uplcv?utm_term=shatta+wale+akweley+take+mp3+download+ghanamotion PDF link annotation
    • http://mhspartan79.com/clients/9/97/97d0d0788ec4d6723ba7be3cd58769e3/File/77875729717.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/ropevagexamiwapinulazelo.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/degimelubewa.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/c34f3fcb786943e0e01396d5db1aefab/38158135251.pdfIn PDF document text
    • http://www.chubsorn.com/file/files/zabag.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/49024655785.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e4c262cee---jageriweg.pdfIn PDF document text
    • https://casalindasbakery.com/ckfinder/userfiles/files/48756966604.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/xegoledopavupemine.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/vipep.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/99298250126.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/a2baaa6302f534a876b89a3c9ef25b82/17102368614.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078799e937e5---47484348888.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/ruxixozudotovubofaxosexok.pdfIn PDF document text
    • http://bjjiffy.com/upload/lujonuposivuvew.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af0ff82d08---nuzevitebimavabubotovuje.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160843e7a87a68---tezekajoka.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/66465284520.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/7vmi7jkhlsadatosf6q9ke6551/99756419165.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/7nrp5kmsvn7e3pgdug4c24gbe7/20245160682.pdfIn PDF document text
    • https://iword.de/userfiles/file/pobezagevakiwasidoderu.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/wofakataf.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/emglf139jk4md4af4heoffbuov/23072497643.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/7f6f4b0666321416ab953dafe3fadfad/96596878506.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/lizasabuxixijuluzu.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/s0mu79h9qdkm295c4pohoil65o/18657332612.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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD979 17272 bytes
SHA-256: 0a6eccc7f31394367b72dc87b91ec8f90ac2d96bd82bdb447f86b51418810082
font_01_sfnt_off00010727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10727 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F34 5172 bytes
SHA-256: 309ab1e6bc8f0fc707de84e63ff9d05d6cfaaa141fd7905431eb13ada7284d22
font_03_sfnt_off000131ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131EF 11108 bytes
SHA-256: 5705f57f16780470458da344887dbfb529b9a035cdb00e1246a438e5e8e889b1
font_04_sfnt_off00014b85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B85 17376 bytes
SHA-256: e10e7ab40f177be27df23c81a5fa53b2e1c65e8521b2d8055efe3940e2e8a958

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