Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac0075885e5036a8…

MALICIOUS

PDF

96.3 KB Created: 2021-07-06 18:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 521fdef425fb2dbac4543b48d01b6fc1 SHA-1: edcccc91eccd20c473335b52bd0620074f33983d SHA-256: ac0075885e5036a8b0bdb37f7d1b9d2d31acaee2ad87250d0a31605fd9589066
164 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of a visual download button further supports a phishing or malware distribution lure. ClamAV detection confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=best+troops+for+town+hall+6 PDF link annotation
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/f2542a67606c426e49c598f5d917cb0f/90867741585.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794791ee910---87370459952.pdfIn PDF document text
    • http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/63406461117.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160700df5dbd02---rinixod.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16089149eab97f---18255062490.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb335e4120---tedoxosesaj.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/venapebus.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/lobejulemeru.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/fefbb3807db293f5b2dde4a149d766eb/gaxirutumaroralomizodane.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/24m9ettnssunht9ba1cbl9ii6m/27349029505.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/eb664b7a2850565c82075bd4aae96fb4/zomataxanemimonixijiw.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608640dfd8d79---xifuxar.pdfIn PDF document text
    • https://shiphangnhanh.net/uploads/image/files/demadaloxuzasozilis.pdfIn PDF document text
    • https://couvreur-hautdoubs.fr/internet_new/images_et_fichiers//file/kowuniriweporiwino.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9c2dc73739---xodarijotolobapupolepon.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/1dc74f1712a52bdac4d559f57e3bad62/63016676878.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160711646be616---42626610432.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bbecf5ecac9---pafilosupexil.pdfIn PDF document text
    • http://kasargod.net/uploads/file/27414456698.pdfIn PDF document text
    • http://proxkimya.com/resimler/files/15858803431.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/0idudrd1kn5bo5lfhktbcn2140/wexirunifikakodakefuvurof.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/00a82470ed965fa77ba95e5f2451f19e/topepemivenida.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608146a755675---xogolukeberotojirelijufe.pdfIn PDF document text
    • http://learningkey.org/userfiles/49846731678.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/begutovitunibaxadug.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_off0001129a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1129A 18008 bytes
SHA-256: d5b01a883f6cd5a944564fb4639c0b5ea8adb615ff0e582aff73c028f4fc6fd3
font_01_sfnt_off000141c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000159da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159DA 10672 bytes
SHA-256: 3713ccefa5a9f02659499c719208db89add741694ad369bca2229818a42da185