Malicious PDF — malware analysis report

Static analysis result for SHA-256 7feaa9f1a0921bb0…

MALICIOUS

PDF

84.3 KB Created: 2021-09-22 21:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c92eaa0a1340df3889145348ccaef1de SHA-1: 66808f8fee8f83c069fd83a34717e784971fe82f SHA-256: 7feaa9f1a0921bb0dfa2fa11939ffa9d6f8a85bf7b2a0dc858d19ab449a6ddf1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing campaigns that often leverage embedded JavaScript for redirection or exploit delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://queure.ru/uplcv?utm_term=cinema+hd+v2+free+download PDF link annotation
    • https://yukkumpulgroup1.com/contents/files/furilelajewizodefagod.pdfIn PDF document text
    • http://sysquare.com/UserFiles/files/89431080774.pdfIn PDF document text
    • https://inijariku.ugdherbal.com/ckfinder/userfiles/files/78972592933.pdfIn PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/jepikosofopojalafigomaw.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/dizejawakadelewerijab.pdfIn PDF document text
    • http://i-physiology.ru/upload/sinosibafifumurakanidujef.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0665d334a---buxujokexafo.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614412284d790---lunevunixiro.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/ccsccslrd368eu753bf70p0mof/4898412070.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/059449049c3e55b051c4f3918522cf44/datuzifira.pdfIn PDF document text
    • http://coumert.com/images/file/dubamuvanag.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/lufasagitexamabetizedewan.pdfIn PDF document text
    • http://www.painters-restaurant.com/userfiles/file/95467847106.pdfIn PDF document text
    • https://globaltranslation.com/demo/global_translation/beta/userfiles/files/jituxujijakukojadenulij.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/ef0ee4514d14a1bf20b982d81d95575d/ladosonefax.pdfIn PDF document text
    • http://greenvisioninternational.gm/userfiles/file/revapumupilakev.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/tunojigabemunatulizaxe.pdfIn PDF document text
    • http://euro-ex.net/images/blog/file/bisatenaxufeluv.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613809a09fa5a---gefexedasonafimujekorudoj.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/mozevagiwonijav.pdfIn PDF document text
    • https://institutdesante.org/userfiles/file/47977355704.pdfIn PDF document text
    • http://medeeatour.ro/mm/file/39599547665.pdfIn 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://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_off0000e454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE454 18284 bytes
SHA-256: 29e3ae41c9b94ef592d69b899d57f9faacb79e818a85031820c70a3481f15d8e
font_01_sfnt_off000113b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B7 10656 bytes
SHA-256: d52bbc7d156e3ac64182a1f77c54ab052ed0e7b28a519693b106878edd85ae5b
font_02_sfnt_off00012bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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