Malicious PDF — malware analysis report

Static analysis result for SHA-256 7612cce85749c006…

MALICIOUS

PDF

87.0 KB Created: 2021-09-04 03:36:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: e2a0b31b0a71cb4e4bc5299523d752c7 SHA-1: 4c4e8f90116dd31b918f393c19ed4c6a549fde61 SHA-256: 7612cce85749c006a94480feb4d6283e5b9547a1a6547072aed7d4bb3e5469e7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it likely contains malicious content or exploits. The document functions as a link farm, containing numerous URLs pointing to various domains, some of which are hosted on compromised CMS upload directories. This suggests an attempt to redirect users to potentially harmful sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://krisoc.ru/uplcv?utm_term=konar+tamil+guide+10th+pdf+free+download PDF link annotation
    • http://katour.ru/admin/ckfinder/userfiles/files/38912334162.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/f08kg7ndrptia77uhhedtmickg/17841417964.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/13552775571.pdfIn PDF document text
    • http://cartopack.com/Images/file/41515037928.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16079bff205839---bejudu.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/4d480d28cacb489d207257fc772aadfb/86000890649.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/gsbkl74gktipf1ngfo72ps4v13/xevamonujavemabubuv.pdfIn PDF document text
    • http://newo.ru/files/files/2511254791.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/75540596834.pdfIn PDF document text
    • http://teacherandtraining.com/coj_u/KK/userfiles/files/rajolomalevoz.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/41793017663.pdfIn PDF document text
    • http://chothuexehochiminh.com/userfiles/file/33261051017.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/dudivadegujave.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-13/20210513150501313919.pdfIn PDF document text
    • http://sepremprod.fr/www/images/mediamanager/11325986614.pdfIn PDF document text
    • http://dienlanhhuubinh.com/upload/files/20092690032.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/6u43tfq58j1j0ehk229prfim25/63117347976.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a42a1e93fcf---13667633840.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/sanusazovisigevigo.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/784850f68ff520af2b333f053fc5b05a/saledokogezibenezatalimap.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/belugemigamutekijiviwaz.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/viwileviketuwemasuxedoba.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

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
font_00_sfnt_off0000e631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE631 20648 bytes
SHA-256: 49950c342f01352fd9a87b710ff80334c5393dfb6e30390e20934164a77badc5
font_01_sfnt_off00011caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000134c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134C6 11128 bytes
SHA-256: 47ae924baa8d46da7759649253600c7484c68f3c7290c57a5c5603f08a6aae4a

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