Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d2f0f25402e6e9…

MALICIOUS

PDF

83.2 KB Created: 2021-07-01 00:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 313dd4e43ce1f55f06164a25bd00095d SHA-1: b88e25fadcd5be6f115db1e7eb8b12c2df895c25 SHA-256: d2d2f0f25402e6e9daf5188cd21fa75562e128d2cebd0ab470a0b251545be4f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other domains, likely serving as a distribution point for phishing or malware. The presence of external URIs and link farm heuristics strongly suggests this document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://drafthe.ru/uplcv?utm_term=diary+of+a+wimpy+kid+cabin+fever+pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/8d52e70f0a6b7d63f169f37e7e918c58/ranelipusel.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/anv9r5bp1hk98i5528nadia144/94953780906.pdf
    • https://tractorpulling-emmeloord.nl/upload/file/78775199303.pdf
    • http://ayurveda-shiatsu-nice.com/upload/files/2220806354.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/jaelbo3fonn7q2sj6bpnp2gf73/731626313.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160928ee5bb5d7---dajerolovugif.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b8158a46a---53666613126.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b035d5847fa---57116474647.pdf
    • https://hirurgija.me//files/77278961247.pdf
    • http://nsdadventist.org/FCKData/file/wibitusevobisumulufef.pdf
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070fea5906ba---mulerodifimeratezarog.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/mut2hdrb99337ibdpn30br7hg8/65948699485.pdf
    • http://broadgatecapital.com/userfiles/file/fevajekuzotadazizisojela.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b07c69dae---20428849005.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/24097e45064f2544352b5bea121d34ed/kapomogapaxosa.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a271441cc35---murerifakiwa.pdf
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/e92ihs8nsc5j9ctjpqrsj1098k/bupitot.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9804ccdcbf---71811459050.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607d120060e39---70333315003.pdf
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/f13e92eec28e6d95011ae39df0039b3c/72106592430.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1492726de---44329877535.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/212ent43cumvcajuuetpi5lqcn/36027542704.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/37c221c1f3d47bfe673f3c12989b9292/93456061490.pdf
    • http://www.gabrielamaciel.net/images/content/file/dixaxumopixuk.pdf
    • 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_off0000e0f2.bin
2ecc4f58d27421ef73eb7c2e0dab7e8475ade811f361191368124ec351ea3597		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F2 10968 bytes
font_01_sfnt_off0000fa30.bin
eedfea55d16a6616eba2a604ff31cd0b576766268c389f4f7b30a30c98a4ddc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA30 17240 bytes
font_02_sfnt_off00012757.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12757 16792 bytes

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