Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab54ebdc398e6022…

MALICIOUS

PDF

74.3 KB Created: 2021-08-25 17:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3c42b08c34710581ea2c70887ee9f376 SHA-1: 11a2c388ec440573f3bf5931fd159a6868e60042 SHA-256: ab54ebdc398e6022b087f518ecb378113860fad0860b4649f0bbad770d227418
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress uploads and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, but the link farm structure is a common tactic for directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/86754b94361fdc506d992f5e34cf478d/29197688077.pdf In PDF document text
    • http://garmagostaran.com/Upload/file/37914228749.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b47f1c241---16830360147.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/kusijuxawunewibevim.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/bf7bdafc149b101dd84a36cddbeb2fa0/vanixukojebivimewo.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/ilmttmhvn1f540s7bgkumo4ig7/gesawib.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/18236828819.pdfIn PDF document text
    • http://stringladies.cz/userfiles/bekax.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/41143873163.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d25d141e398---kujolugokumipipudetax.pdfIn PDF document text
    • http://aquatherm-graz.at/files/gukametimerijerixadon.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/08e6800a4988bdfd214938309a13b9f3/71563249100.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/15075225345.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/lijirazuli.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a3b55349c---zunaxarobari.pdfIn PDF document text
    • https://santechnikosdarbai.lt/images/files/manebufosonaxud.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/59990382271.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/lifapefapi.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/c2b0861dc72ba3612240be2ebed4dbc0/dowitixisava.pdfIn PDF document text
    • http://amindoost.ir/images/upload/files/75273869007.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/45368052146.pdfIn PDF document text
    • https://onwater.my/uploads/file/biwiriputen.pdfIn PDF document text
    • http://ylphs.com/ckfinder/userfiles/files/87213953674.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=madea+marriage+counselor+full+play+onlinePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF26 11072 bytes
SHA-256: 410a1fc076edc9f6f4335992cebcf8b7617f1ab12a202002046c07b47c0b3ab7
font_01_sfnt_off0000d8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BF 16352 bytes
SHA-256: 99260671c280711706c6a90b7ddf15c240172dff492fb0b4a7416aef2079409f

Open this report in the interactive analyzer, or submit your own file for analysis.