Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2980b60221f551e…

MALICIOUS

PDF

93.2 KB Created: 2021-06-08 22:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5bde9e9f9587f1a423e1b74da91db3d7 SHA-1: e3024bad4c136b1abec9d873a3c43df05c8d289d SHA-256: d2980b60221f551ebc275d9673b108ed955ec16386a791116a9302ec19a2a646
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://huntic.ru/uplcv?utm_term=kannada+novels+by+saisuthe+pdf PDF link annotation
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4ae89569b---kuguru.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/23f6edeb135674d93a406f3ad1d5ec3a/84951404451.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075063bdc147---gijipegulinawokoliba.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a97cca279d6---32039160824.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d404c63752---56238565272.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/86926877164.pdfIn PDF document text
    • http://vo23.ru/upload/file/xejoxefekabag.pdfIn PDF document text
    • http://alexsrmenchion.com/clients/b/bf/bf5401b25fe3457642f5a6f1150d5537/File/mananoxilelabixexi.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4767bbeb7---detowegemeposoji.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/45061938952.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/dd508aec118c9ef61e9055ddd0d11a85/21119909259.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f42b9322d7---wawuzozimuvesukoruroniza.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fea589d809a30199bba34a855987d23f/buxafube.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/f93c53010f1963a2e6d09574b898146f/gosejagupesopotodewesif.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbc3b1a932---rofenizutosenewuvuxe.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0bd3f200b---kalosubakeguz.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/bubol.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010012.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10012 36052 bytes
SHA-256: 54c4eafdda7802883e5a026eb41fc8391d3d0bcb5f77ac855d2756e8183a2bf2
font_00_sfnt_off0000edfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFB 5304 bytes
SHA-256: 95dec9ecf07d922110a660e360a2e5450a40a1818a8335c6c62f78cd6e7bac7b
font_02_sfnt_off00014166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14166 11128 bytes
SHA-256: 803a335f461500ecbf18c6a217bb803a0d51b024ab8e0047da4759bf494690a8

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