Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9dc30262fbe263c…

MALICIOUS

PDF

73.7 KB Created: 2021-08-01 05:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3f20938b3ff2b20a9e5e7cd4bc48301f SHA-1: 0e4d28cb1da6c34978937fca3168dd6bc6981d71 SHA-256: c9dc30262fbe263c927a57ed92d040bac9b214be3179391492fa5e986a09ed6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests this is a common tactic for distributing malicious content or conducting phishing. No scripts were extracted, but the structure strongly suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bbccf7919fa---bopekopa.pdf In PDF document text
    • http://decaiyun.com/upload/file/210615030337758826lp8p5s4yztzg.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072091228844---4851957395.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/7d680fc8b065bc02f52b4372e6c8d1c6/80218369306.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/96564061008.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/50488173235.pdfIn PDF document text
    • http://yuha.be/_files/file/79353470871.pdfIn PDF document text
    • http://zxsolar.com/d/files/tukugawixowodedobekivomot.pdfIn PDF document text
    • http://bracyfamilyreunion.com/clients/c/c2/c2db1a97f769835965582c74015c7782/File/jokexenepazivunuko.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0dbdda39d---86256770848.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739d9f4a277---95598862719.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16092eb19cccbf---tenaboxagugiguzizufugu.pdfIn PDF document text
    • http://allasclub.com/campannas/file/2131393119.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/sonodarotadawivavogeson.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/zagerafifiwogosobiza.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/a3314417124f03cec8d1b50a8e5ecd23/didemedo.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/dunowawubeketekomowal.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/43762620236.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/72428746473.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/24350326230.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1610361810cb65---60877867468.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/pololuj.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/273c4bb47bc0b1d5141043aa4b8d52a0/pakivapapuzibamafu.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867a0f00b9f---tekobine.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=antrenmanlarla+matematik+yeni+nesil+sorularPDF 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_off0000bbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40F 17220 bytes
SHA-256: 486323dce6280128bfcb47bf1e156d0778ea882060b195a20c38177fdadac4fd
font_02_sfnt_off0000fe09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE09 10556 bytes
SHA-256: d421cfa8f61eaa7aa7038512476a217d1968395765cd55a81c844d1cb58a551e

Open this report in the interactive analyzer, or submit your own file for analysis.