Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b2a94ea0ddef24…

MALICIOUS

PDF

83.6 KB Created: 2021-09-04 00:25:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 18bc335373f47de30e054dd1f3959cac SHA-1: fd5ecb398e70bdc8fa0b0f7bd71a9939f3029226 SHA-256: a2b2a94ea0ddef24435dd941f9349e88759467a3b4b7731be4abab42a134bb2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9977

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://ehoron21.mn/uploads/files/55335863068.pdf In PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/57f0vb276o38ckjrvffbtcso1s/4029572720.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/93640254810.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/977710232.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/79089809545.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607c606f74891---nomazujigetakoxudavute.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f89a6fad9aa73dee56d1962b7182c844/kurumoxi.pdfIn PDF document text
    • http://festacreativita.org/userfiles/file/miwabimuxibusukolimefep.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/sh7j75gf6ashlisn5bekur4g5u/jetebezibe.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/sewuxanezimudepewefivibuj.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/40367775994.pdfIn PDF document text
    • https://hostingalani.com/calisma2/files/uploads/sotasoveveziribinotabep.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/41606085821.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/95176400438.pdfIn PDF document text
    • http://recrute.fr/files/files/2172018091.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/migoretiliwasetuperuluwud.pdfIn PDF document text
    • https://collegemahan.ir/basefile/collegemahanir/files/lepif.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/74bjlk50b5g98c5iqhqsgqflql/tagupetofolemabow.pdfIn PDF document text
    • http://garderoba.sk/images/_file/22611520842.pdfIn PDF document text
    • http://biosite.ru/images/news/file/32739736336.pdfIn PDF document text
    • http://saigondome.com/uploads/userfiles/file/mobemi.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/esjt6t329n2isetev073ncv257/20144198484.pdfIn PDF document text
    • https://netlandschool.cl/files/66140428718.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=catholic+biblical+apologetics+pdfPDF 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_off0000e0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DF 10864 bytes
SHA-256: 1695499a7448be68b25e56f8b56041f2073d764222da42c07d5730f1bb4f046f
font_01_sfnt_off0000f9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B0 18168 bytes
SHA-256: c2027da50b9fb04579fba5f9f960ff83978a79985911380bacf05059147f16bf
font_02_sfnt_off000128a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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