Malicious PDF — malware analysis report

Static analysis result for SHA-256 56829fa0c17cd8ed…

MALICIOUS

PDF

83.7 KB Created: 2021-07-09 03:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 441614f4c12333dd6ba1be2c9cd61eb8 SHA-1: 79d409b7f78ccb08a5a26c4e5ef4ade9e974535f SHA-256: 56829fa0c17cd8edb632b486a9c3a64e664dc8b049cc3a0366015db0ae30ec43
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and potentially disposable hosting domains. The embedded URLs suggest an attempt to lure victims to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a333cdd8a1d---nupekikifesiligitolijuwu.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/633e8fe9fdee0a6d73cbabcf7d916cd5/38335701231.pdf
    • http://hzzxtl.com/UploadFile/file/20210624224812730.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607287fdc1340---16797702194.pdf
    • http://freeski.hu/freeski/file/34492841421.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/jr1vi6t2dsjjnuc8n6a6io0skf/7101692388.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ded04e3fda1---mewotugozovuxo.pdf
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/63365814623.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085ce32813e7---92857997826.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d497ca1642---57783633633.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/1d1chq6cs379g0q3kcam10c2po/nasapadojonomajib.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/dij3i6ht4kqn90ukd4m2icjura/xijozizulegipalowu.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c62d23acc---mimetelotanop.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16094ab7661b39---monodivenajewebikuj.pdf
    • http://eska-lift.ru/userfiles/file/fujijapozavezoked.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/e738f6d0657e791389bbdfd55cb0e192/gizenugoxapadufopesono.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/7f358aeb17218c3185b7071fccd9eef1/buzazuguw.pdf
    • https://lose-weight.tw/upload/files/razejunefijagiwudikuw.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/44806ae62fdd4c4207286d7f022cab7f/62160225425.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160a35656c6932---kelazegebuzumowi.pdf
    • https://lapiadinafelice.it/file/jejufasiwozeverejanadotap.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/tm6qb3s0b7lp5cnr25ijmucqc2/kexupofupar.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=free+fire+game+under+50mb
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e634.bin
8c79c57e0e23e2719e3facfca029d3e95e4a60585edc4e5dafbc31a8ab3cf916		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE634 10740 bytes
font_01_sfnt_off0000fea8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA8 16792 bytes
font_02_sfnt_off000116ba.bin
eb1df3fe3f79f6dd90cc39ac7f2c70f2ab61f3c784666dbf4302f14dddf34faa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116BA 16524 bytes

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