Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72558e5b32b8e7c…

MALICIOUS

PDF

103.4 KB Created: 2021-07-22 15:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e3040c92e6756fa2c7788c5541422d49 SHA-1: 36a270a1f04f303a159f252de4d35e94891bb6a3 SHA-256: c72558e5b32b8e7ce7853675357e1914be428ec808341ee63f1d1e51caa3b038
156 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or scam attempt by embedding a large number of links, many of which lead to compromised websites or disposable hosting. The presence of a link farm and the specific mention of 'world of tanks blitz hack android' in one URL suggests an attempt to lure users to malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/1q9mmeiannl937anim62fmuo0p/24316240977.pdf In PDF document text
    • http://studiofantino.it/userfiles/files/45345592928.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/67679017284.pdfIn PDF document text
    • https://kar360.com/resimler/files/14537533297.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/58981869385.pdfIn PDF document text
    • https://studiopros.com/userfiles/file/In PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e27d94c38---rusofafaman.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c0c323efd---60025442991.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/djs9eqbnff9dl6qcimggtl6lrp/5513275776.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087816359569---mopej.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/6385f230ef3596bfcd3a8bfe55476952/74523186698.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/7b0e2fe5b785b9319977fbcfbaa30dd0/zuzokuzoj.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/28264034412.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816bf9506db---41905978521.pdfIn PDF document text
    • http://camwater.org/media/files/limejugupe.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/crnehgdrjap6bh7p1kqcgf2m25/64295276161.pdfIn PDF document text
    • http://kme-kme.cz/files/file/bamabegotazas.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/dobanoxuziluloxosijumed.pdfIn PDF document text
    • https://hfbee.tw/upload/ckfinder_temp/files/20210629123801.pdfIn PDF document text
    • https://ancoraeducacion.com/images/71054175676.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d839f5b929c---rakum.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/tewaxagajivef.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed8495826e---62015808802.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9140c9caf---74186635795.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086f9227fc50---14016551408.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=world+of+tanks+blitz+hack+androidPDF 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000136fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136FB 10728 bytes
SHA-256: 86d783d368e8bdb54ab0351601018e53ba1361870640e79c60a1e39dfe05fe5d
font_02_sfnt_off00014f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F98 21336 bytes
SHA-256: 5bd22cbaf60c9337c6ac89c26b4dbc8c924d7e120b9945a17dfea6145ffde15c
font_03_sfnt_off00018661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18661 1708 bytes
SHA-256: 3b2665576e0e733557d54fd8b7ab9fbf951407a02dcda8f4f3f3dabcf3176750

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