Malicious PDF — malware analysis report

Static analysis result for SHA-256 32fc66edca10f199…

MALICIOUS

PDF

72.4 KB Created: 2021-07-02 22:35:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 1a12432d01c6589afa7eac3c9607666b SHA-1: 4ee2eaacd7922dc7de384dc67ac1f14f5a5498c5 SHA-256: 32fc66edca10f199dd092d6d2ad41c3b27a0d74a4bcd2a47921fe896209266f8
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple websites, with several hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is unreadable, but the heuristics and numerous URLs point to a phishing or content-distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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 http://tokyoto.pl/UserFiles/file/bexuvosozowinijat.pdf In PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160949cf77588c---jegelefegapaxuwi.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a679cee12---jikeduvoboxatedejevisedu.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/jupopuwunolukagoze.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e670137ae8---takipiwezobabanuga.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/buzoj.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/vavalawumitiloni.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a18d02a1a2b---gefebolu.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/teluluriwiwovomo.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608285c01f966---lomixelofaxipude.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/mabusuj.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/rfpmguh853qokaj5dpagc35b39/16942662929.pdfIn PDF document text
    • https://ewt.cz/res/file/nozobozumejukis.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/invhs55ddippvgla4gdaaojj64/xodubasivajumebagaf.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf8c81525d---xowonigotewizuxujitizo.pdfIn PDF document text
    • https://anfauglir.com/images/file/gusiziradejobofaz.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609868c5714b4---vozifovuvetaluwalilarebex.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/eheaabss12mpih7d8k67vph1bq/jogikakevi.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/55405086108.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/40015087840.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c311c733744---19415818854.pdfIn PDF document text
    • https://kultmotor.hu/images/files/gipopedobotifiwozi.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/nubikuvewijuzagave.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f73ad35ef3---xiviwowuxaserusutegosixi.pdfIn PDF document text
    • http://ourjamesfamilyhistory.com/clients/1/14/146a9f92d0a296c7c29e793db058bb30/File/72960815785.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/87021d9cc11377d320cdc3c0d07b5fa2/momutovabetijowutoralenu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=profitable+business+to+with+1+millionPDF 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_off0000bd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD3E 10856 bytes
SHA-256: 7918a17a5cb6200605323803c3df7342836839eeb4a162c48f23a72ac37fe010
font_01_sfnt_off0000d63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4F 14836 bytes
SHA-256: 1f0e33e381617bd0dbdabef93f33ef5a8eebbce95423f19b1dd3c20e1140ce16