Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a32633a28982784…

MALICIOUS

PDF

72.2 KB Created: 2021-09-05 08:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 85c16b3fe91098180180f45718312ee2 SHA-1: ec7088a421274b96846be890979697827ba1cd01 SHA-256: 2a32633a28982784257d175c06ed7906e8b79235742d6856b4ba527f19c5b47c
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with multiple URLs pointing to potentially compromised WordPress sites and disposable hosting. These links are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://coretry.ru/uplcv?utm_term=cesi+marciano+antologia+pianistica+fascicolo+1+pdf PDF link annotation
    • http://tuzvedo.hu/elemek/file/woziperiguluno.pdfIn PDF document text
    • http://talani.nl/userfiles/image/file/89519721000.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/774644caa709d43eb39f4dfb32542260/17221287926.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/donefevufu.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/mewos.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/kiwev.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b06e34753---dofanamoxufijazudapimaw.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cca6e2d65---23514214461.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/9543496479.pdfIn PDF document text
    • https://limadelimon.com/images/file/gemijetigifasofemujaj.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bbc8c5d0b---76539566578.pdfIn PDF document text
    • http://iberia-ex.com/images/blog//file/71293952619.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097571fbfe93---wukanudadibuzudej.pdfIn PDF document text
    • https://arhstroi.by/uploads/files/lekogutenapiboze.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/7fcf54ac746d989a4e44df065e970c7e/joropowibode.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/toxoripenutasesonoxedat.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d4396012d6b---3681097445.pdfIn PDF document text
    • http://caryhigh1987.com/clients/41333/File/80659650957.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/kojilofole.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161003809b3ec8---widuwakorufefegoket.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/bedafubuxedalosesuf.pdfIn PDF document text
    • http://azstorestudio.com/uploads/files/rukolagipam.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB574 11044 bytes
SHA-256: de24dfca22158b79a77a9215ac7794b373bfa1befeba1b3db0083797560a5952
font_01_sfnt_off0000cefe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFE 16828 bytes
SHA-256: 6801fca79e417684d06238fcc5244019d2cf5cd13f23cd02192538766c582928
font_02_sfnt_off0000faec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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