Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0a7504c59817e8…

MALICIOUS

PDF

88.4 KB Created: 2021-07-01 00:27:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c409f42dd0ac151634eb698ab87effb3 SHA-1: 3c3367c614299aff1d1591d937e087415ddbc8c7 SHA-256: 6a0a7504c59817e8661f72990f0dede72c75955a91bd42d52084d9220425c711
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and by a ML classifier as malicious. It contains numerous links pointing to websites that appear to be compromised CMS upload storage, suggesting a phishing or malware distribution campaign. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746c509cb71---40233435465.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0f7a9c56c---87558792404.pdf
    • https://intrigantka.ru/images/userfiles/file/xitonivokalibesode.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071192caad6f---pikaze.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/fe4c35ee8c682dc4468d05a93dbf29c4/3923093152.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41c97e398b---62330207950.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a38ca48a7---25634245251.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/7vjqig2cmsqhi56si3f1ivimn7/72334934015.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcfeb0ce94---xuzotiwesowez.pdf
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d9bfe4145---numosotoxuruvijiwawib.pdf
    • https://kodcomputers.ro/2664/uploads/52044539049.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d82a8e9ce---bakojokimejosep.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16095b5711428e---dukemufenusoper.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/8rgru8qaemeulpphq2n5d66kf5/26981815446.pdf
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/10711c5b197fd4e901d0e0eae6f26fee/79088599282.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160972457ca496---21471367772.pdf
    • http://agiteam.org/clients/b/b0/b0c4817036ef1cb73596cc935f3fa86d/File/kagafutupitasozozo.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/eda7c6e3b494bdde232ab9fa1c1cb95b/zoxamojuresadogezepujidum.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/51841c0a2407700641a1bf57de8d6c2e/fokirenurijirimasuxuroze.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/8685ffd0093275a576cc855d3b45d1b0/15601654014.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/grmllbf71t897m670iqf0fu4br/rifizovikitepinodezixinop.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/6558fbe1f1ee6c2f3b9c24aa1d55796b/bijadonomasufut.pdf
    • http://automotiveenergy.cz/userfiles/file/budexi.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/mk8peda6o1bqlf094c5q7one67/sofazopofidabaxanaworud.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=teeth+fluoride+treatment+cost
    • 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_off0000f783.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF783 16792 bytes
font_01_sfnt_off00010f95.bin
44d2aad560f37baf9e06e9f6e4f557a3a45f70174132c2319cde9917500cf5ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F95 17464 bytes
font_02_sfnt_off00013cf0.bin
517fb5e981cfd923519892ba86d52a2db62248340a521c84268327d9b3a3add3
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF0 10804 bytes