Malicious PDF — malware analysis report

Static analysis result for SHA-256 0765dd57949f75b9…

MALICIOUS

PDF

95.7 KB Created: 2021-08-18 23:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0b1d93594c3f73b430a5303ac8b99fd4 SHA-1: eae7b93a152f62d4527ec13a5853bcec137dcf8e SHA-256: 0765dd57949f75b9b32beba8844ae68ce693b40a62d538ca33635cc304349a2d
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to other PDF files hosted on various domains, some of which appear to be compromised WordPress sites. The primary purpose seems to be directing users to potentially malicious content or phishing sites, indicated by the presence of URLs with terms like 'hack apk' and the overall structure of a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://pixomot.ru/uplcv?utm_term=mlp+gameloft+hack+apk PDF link annotation
    • http://sbnjl.com/userfiles/files/luxesidapoguxoketiwun.pdfIn PDF document text
    • http://womenshealthcarenp.com/clients/2/29/29a32d4da59f0b4eaa4573e1354aeabc/File/88080525498.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/50173054619.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/5979f23614891b2518e702ee54058b6d/wadomututajeruxi.pdfIn PDF document text
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/zejatez.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/76869988893.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160db25c5a6f0c---kenogik.pdfIn PDF document text
    • http://donelreunion.com/clients/5/59/59051ae02fa593b10ab13f41bf6316a1/File/dabokef.pdfIn PDF document text
    • http://medica-brno.com/files/16300509720.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/basorepuvulenexaka.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/pisixelineloked.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16082f67f697d6---76805725752.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/93716517020.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/deridapawipejaletef.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edd41d372bd---80425813.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/nafuvepogixijasas.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/d33aae7f5f053a424cc0d6ef01c39ec0/8021590094.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16089282654744---48874978715.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/lafewagupajimujebaxelejib.pdfIn PDF document text
    • https://cupanghitam.com/contents//files/fivakagewosa.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/74a1b622c01450618c9e1a7a8de02abb/sebaxonunoruko.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/c3c2c2c98ceda08e343301143c66b88b/94871678769.pdfIn PDF document text
    • http://soupworld.de/upload/file/fenavosebakobe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001110a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110A 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_02_sfnt_off00012681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12681 10548 bytes
SHA-256: beec08994631a5aadc6c7c5cf8b89080ae49b94215f953392dec728bd0ba3873
font_03_sfnt_off00013e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E99 18852 bytes
SHA-256: 5eacf9d8e6aa0493b6a2859712fd284f80dd58b9d652dbdf2d43e6c2cb0b15a5

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