Malicious PDF — malware analysis report

Static analysis result for SHA-256 7365660acd882c68…

MALICIOUS

PDF

80.3 KB Created: 2021-08-24 05:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6499bee42ca3274f5f485144a1604383 SHA-1: d8845ded7e98036c48f8e5a6fdccba24121110c1 SHA-256: 7365660acd882c68d9554d961cdc01eba1d1251a7089f74adbcee6993ea047ce
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. These links are likely intended to lure users into phishing scams or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://catamma.ru/uplcv?utm_term=tabou+game+cheats PDF link annotation
    • http://stefani.cz/fck/file/likemozibodinukowevugumi.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/0ibf184k9i7fqg2bu43i5n2vb5/34435123324.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/u87edeh5fbhq3rm1ri4gd0rrts/20580357672.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160af7f60289c2---lovovedawavofunabupesef.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/74a47d4456cf256398889e4718845640/kamoretejijipikepitux.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/70084441832.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a86152b76bb---53914388186.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/45740923734.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210727_CB123D61B9CAE5DD.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1608702d8687dc---51926388048.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6da385355---sotas.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/zaranosofikubutefazaduzu.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/moin4iuvqtcll6di7gdd7jh41j/zodifosedabititudepoxuv.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8597033166---46410080784.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/hmm4b3b9iva3prdd3v6ihsvsgd/37373436166.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/d83aa1c651173b306b76026f28ab131a/nusoloxezefesekifa.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/99785041595.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/t2og3kvdohklghapdrobsjuc07/26525123211.pdfIn PDF document text
    • https://thepainter.asia/upload/files/vijudere.pdfIn PDF document text
    • https://globalmediaminds.com/uploads/files/lukidirude.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/nakubovam.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/bk7ci2d5f03r5ikitv6485tgrj/3587822901.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BC 10540 bytes
SHA-256: 8a99fb8dc4deaad092607844f3f50303cdf9c4c67eef6580d5e8bb8c6bec4bb8
font_01_sfnt_off0000f1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EB 15756 bytes
SHA-256: 01a9832d49e33b81f276c8580a9a9297a5e095d5c5fc59ff8363444dc7f3fcea

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