Malicious PDF — malware analysis report

Static analysis result for SHA-256 093dc0ed0336b87d…

MALICIOUS

PDF

83.5 KB Created: 2021-07-03 02:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 58e82617074ce1dfc34d770715eeb700 SHA-1: 96be158ded352a9ad3696d368e6f0cbbfb346eeb SHA-256: 093dc0ed0336b87de4f1c2361ff30291ff165f62c4cd9658c482a1d8ddf69de9
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous distinct hosts, many of which are associated with compromised CMS uploads or disposable hosting. The primary attack pattern appears to be directing users to these external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://sistersaviopublicschool.com/userfiles/file/kawekepijatizebebaloje.pdf In PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c21148bdb18---dovovaf.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/8fe336be0c08f29ba8bd8d135aa41e9f/bositakoxovasujibukofetek.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/hfam9jb1qilnn7j51d7b3f0co1/42848852581.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a8f64e038---17417110896.pdfIn PDF document text
    • https://ptogel2.com/contents//files/vovimevabove.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/resizidemoloxazigeda.pdfIn PDF document text
    • http://short-story.ru/upload/file/ziwifegimojad.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/6f50bd3a9461f8767981d9b2fc395f62/72862398608.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/bagise.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e05cf33fc---37987293507.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/norujesejuz.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/d65277ab3a75974db3bd72310bfd4178/gatunewivevobedowoda.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/pobujixoxaf.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/26f584d72acb94411aec2262adca4500/69552114981.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a818ac1e1ab---tabezebupudorabeno.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/jejurotezoludigi.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/29fb0e291d4526f7b133862df85a47e7/77620875587.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/oo3mtlaj5u2f3icgrnrv7a3p00/39272175849.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c4ed01200---86017724539.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/05c88a60b4c9b08ee01c11f4295a0a72/84001286267.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/sokoralotav.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/sirur.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210614081639_917239225.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=test+for+past+simple+and+past+continuousPDF 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_off0000e298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE298 17084 bytes
SHA-256: 7417a7435285edbb97c3362748d61bbd9715eedf45b8525e376888f470a48c97
font_01_sfnt_off00010f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12748 10844 bytes
SHA-256: 5e9f8e10766acf9412e4a0a9f369289a91f599a3a7f1d9bcf71b3fc5be6c96e3

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