Malicious PDF — malware analysis report

Static analysis result for SHA-256 06097532ba0b732c…

MALICIOUS

PDF

84.3 KB Created: 2021-09-04 02:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2e107456973ef34276c0154e8fb33e80 SHA-1: 3dd3707c82d2b3270d0e21ab0773dae000f73417 SHA-256: 06097532ba0b732c2b1479a3092208aa8c1081b885cbe4991c7dd5f62574c29a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting, likely intended to distribute further malicious content or lead users to phishing pages. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a deliberate effort to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/fag0jm69mdeasro2cs37gm7vj1/kutaretinixonuvuxoruzow.pdf In PDF document text
    • http://appextskihjthj.handysociality.com/upload/files/96620636841.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/34908062703.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/40014220994.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/219c52b567fc51e6c4f40d64e04c3412/74506516862.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5da08f90a88651585f81a90e2cbb06db/pefobokufaxofajawiza.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098688fc05ab---norazudejizego.pdfIn PDF document text
    • http://suchanekstomatolog.pl/files/file/1548090952.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/zofoxefofi.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609692bd45aad---15859142071.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612199f9ba610---mebovabutevo.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/guguxudobediko.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b63f660453---zunimimudufepemi.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/aca5758f643823adcaf5917cd003d2f3/36054349268.pdfIn PDF document text
    • http://skikk.nl/app/webroot/files/userfiles/files/tivaramopawo.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/rogudovariledifasaku.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/55b638cd45f4ccd8e7e68e0ed94daee6/rudavubij.pdfIn PDF document text
    • http://unseretochter.ch/images/file/69706853157.pdfIn PDF document text
    • https://skinrepublic.vn/webroot/img/files/38816819620.pdfIn PDF document text
    • http://siembra.me/uploads/files/78510687532.pdfIn PDF document text
    • http://biafrapol.pl/pliki/file/dodedofawozev.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/34a53ffe85fc10cd3c510c3c632f8257/14233202503.pdfIn PDF document text
    • http://cluboutletmoto.net/campannas/file/xekinejipitobojib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=neuroanatomy+through+clinical+cases+pdf+freePDF 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_off0000e22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22E 18476 bytes
SHA-256: 7a0b918ba22ecc660922c69555eada27ea014af374084d0920ca62e6acf05566
font_01_sfnt_off0001117c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117C 11256 bytes
SHA-256: f0ead5a71bb2f9bcdc8ed3b3eb02767218a6b46e0dc6abb4d3a66d9bf2cb06ff
font_02_sfnt_off00012b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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