Malicious PDF — malware analysis report

Static analysis result for SHA-256 3650d3f1bd29575d…

MALICIOUS

PDF

82.6 KB Created: 2021-07-23 20:25:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 02011dfb23772a6dfa16605cab0e117d SHA-1: 0e7947a1ad2cb799a8c4071628f3ff34c92d019f SHA-256: 3650d3f1bd29575d694bc3352915f0ad1a977ebcd3f7a3a7b3adc29f4f665d0f
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lead victims to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://baugeraeteverleih.de/benutzerdateien/wesobokegedikudofe.pdf
    • http://ninda.vn/userfiles/files/tikulunojafegogusikakab.pdf
    • http://hanarotalk.com/userfiles/file///fubuw.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/1de5d59d54d8f87fa0e3d6bc7c18fbf5/setevek.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aff53869180---53660096520.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/807432e64801e04252f8fa939a84a20d/91847863721.pdf
    • https://adasms.fr/userfiles/file/70112783553.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/k2slf9eoqfd4ki4s0eu2v8t61b/72283121495.pdf
    • http://niezapominajkowo.eu/userfiles/file/72689517380.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4423b873fe214632115c851eadff4ed1/25321244422.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/69e66939450b0392269dc20d6bdfd65c/bijosugexezogiset.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8799a89dbd---nilawelolase.pdf
    • http://urbanconstructions.org/images/uploadedimages/file/vavej.pdf
    • http://ultraljud.nu/bild/files/ruzuxalolalunukagisedujif.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767f884ad03---74169331083.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607265e08206c---2408535502.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160be309779873---merawoniwigetaxitarakoz.pdf
    • https://stiff.pl/ckfinder/userfiles/files/30614719325.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/a3106ac61e39486c46b9fbce8394ec6a/sokekuf.pdf
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/20361213965.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc7725f46c---danowokiwemebetuketi.pdf
    • http://wannawwannie.pl/userfiles/file/kutifusul.pdf
    • http://imhkayseri.com/resimler/files/vumesuzexuwabuziwa.pdf
    • https://abe-rdc.com/userfiles/file/figasebabiziwapug.pdf
    • http://volkshilfe-ktn.at/images/content/files/16354097945.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=hack+para+injustice+gods+among+us+android+gameplay
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de49.bin
1eeb9b1c87c262ed43f83a7dc0934151fb2c802756a924a3c2ac2cc257e3d8b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE49 11284 bytes
font_01_sfnt_off0000f88b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF88B 16792 bytes
font_02_sfnt_off0001109d.bin
788fcd1219d50165996e937115682b98e63467b846206c4aeda4629ef803cef5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1109D 17304 bytes