Malicious PDF — malware analysis report

Static analysis result for SHA-256 4697de986d6e9988…

MALICIOUS

PDF

81.8 KB Created: 2021-08-21 04:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c362ecc01470fadc834ac8640017e1e9 SHA-1: ff0c4ff9aef9e348ec2a012e8294d199dc9d226a SHA-256: 4697de986d6e99884a216bad0628ceb893673b614a71c9da447d8008a96a90ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://laborke.ru/uplcv?utm_term=bollywood+new+full+movie+download+300mb+mkv PDF link annotation
    • http://dentish.ru/ckfinder/userfiles/files/sewidepevumovixuvexaga.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/soluzazomarokosanojunoj.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ba35214bd---55759575371.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736b644f6f2---7422356146.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8002d28b76---noroz.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/sokamuxovikufunax.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096dc9415e24---gerefibaku.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/wixubixaj.pdfIn PDF document text
    • http://jenistudio.com/upload/FCK/file/xogitalozug.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7c6bec67f---josiwe.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/36118386117.pdfIn PDF document text
    • http://gloria-eurex.com/36537751313.pdfIn PDF document text
    • https://ganganagardentist.com/userfiles/file/jejedopobizixizo.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d91e0ea72---pevijebesuzajomojuwamo.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/96211699374.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/78736996949.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c32d97c00---fufebetivusujak.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/nanikijemozokupifefidakud.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160829102475c2---7343446306.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210819020929.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/68229721624.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609825d710921---92014703562.pdfIn PDF document text
    • https://auto826.com/uploads/files/kuratatulawukesif.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/6399dfa7c578303dbc35c292a465a39c/88029282496.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_off0000dae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F7 16940 bytes
SHA-256: 8ed882357e011f8eaf58f5f45ccb63ca9b9d0631f0cbeacf32c2ff6c767eac0e
font_02_sfnt_off00011f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F4A 11096 bytes
SHA-256: 1b27cf9c5601f05c51bcc6517aed16df75ac48e312e860d9a26d128624f0585d

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