Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9f03479cd00f745…

MALICIOUS

PDF

202.4 KB Created: 2021-06-26 08:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9ebd586f18a4794d5017f1b35705d0ef SHA-1: bb353175dd85baa77b95b2e0649fc793b8629741 SHA-256: a9f03479cd00f745a15548c97fa331847bffb8a85ae1e32037208403ea4bbf7e
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains links to compromised WordPress upload directories, suggesting it's part of a campaign to distribute further malicious content. The presence of external URIs and link farms points towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://huntic.ru/uplcv?utm_term=online+after+we+collided PDF link annotation
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/5db1be56b3c80c51c8b14f01e76ed416/febineret.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608206ce52ee5---fukogizuvusaresi.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160be852ed561d---xufer.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/62a4f3d301ecf67b5ace96e11bdb11ce/zavesudivezeniwibavosa.pdfIn PDF document text
    • http://ronniejoymemorialfund.com/clients/1/1a/1a75100f29d804137a154ca93ef51a80/File/tunobuzobugutofosovozo.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094505875a98---rifagenogovojukilanuzexo.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/bcmc2vqet31jgmjup12309ora2/29156475747.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804c5d684e7---47014094276.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d7b4b2a6b08a4d4e877cac55fd74df0e/paninoxoxefimike.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160887cb8dc295---63203549708.pdfIn PDF document text
    • http://www.wiz-fac.com/uploadImg/file/sedivilenutafafatepomi.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/f73d69f0d3488c838abb3fd118491e2d/nejoxu.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba979d1cc76---xinowafuwa.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/43705480657.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/86c0d308e04dff645c8b268dcc44275a/65157070217.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d327c01b6---lezidotefaxibugum.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/59n8l6m9gae22c92u86k6l09u7/14665202058.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b4085360294---vuvekemogazonogodovakefol.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/vekumokudagezetibogifunu.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/27264908177.pdfIn PDF document text
    • https://capecoralliving.com/media/file/pezujebi.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/s14stkndhf12q2f9tqsssjgu90/78411869580.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/64667778216.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160891b1b4acd3---surulovis.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160961953e715a---mikonojuxow.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_off0002bee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BEE1 10412 bytes
SHA-256: 9c89aced3b7bc3d536a568b7d4c7eb2f5b43b61f25dfca37baf14e58198d9353
font_01_sfnt_off0002d6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D6A7 16624 bytes
SHA-256: a1b23cc1200cc6cf1e3cd0b22450a842a42a505aba65dd8e6d9f1e4b3c80d954
font_02_sfnt_off000301b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x301B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1