Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea12c5c6f2de22f…

MALICIOUS

PDF

73.4 KB Created: 2021-09-07 19:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 2295c273f26ce16d31257589ef4ff15f SHA-1: 6d9e25554926ad54e4435fc39303ceca746d15b2 SHA-256: 6ea12c5c6f2de22f5f2bc39962399631d4935e76700cd4c2298d5a96a7de1c06
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many pointing to compromised WordPress sites or IP addresses. The heuristic firings indicate this PDF is a link farm designed to redirect users to potentially malicious content, aligning with phishing or malware distribution tactics. ClamAV detection and ML classification strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=related+literature+about+effects+of+bullying+pdf PDF link annotation
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739ed901277---liwewabinuw.pdfPDF link annotation
    • http://delshadian.com/public/userfiles/file/74209621069.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae4987d904---58490957003.pdfIn PDF document text
    • https://coastalholidayproperty.com/ckfinder/userfiles/files/83089120614.pdfIn PDF document text
    • http://sport-way.ru/img/file/sugunesene.pdfIn PDF document text
    • https://limmaginebistrot.com/file/58101869066.pdfIn PDF document text
    • https://cezartravel.hu/userfiles/file/95115127751.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles//file/lisopilu.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/b2fffbaf0e65e6c9e22aeb2c6f0e12bb/kukupetusevafakesafoxi.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ffc14516edc---todugurenolixeteremo.pdfIn PDF document text
    • http://getdol.com/page_data/file/50758549842.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612d3c69935c4---30766541949.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607c574c83679---71961573730.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/desujifajo.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/fdfa9eb1a78cba3cfc70eebb019bf353/94044172829.pdfIn PDF document text
    • https://ghnservizi.com/file/fonarolelenud.pdfIn PDF document text
    • http://sierrahighalumni.com/clients/878712/File/bobomimenizarepepabimekuz.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5fe77808d0---52375104384.pdfIn PDF document text
    • http://zerosquareonline.com/file/rejiwajinimonu.pdfIn PDF document text
    • http://shimoltd.ru/images/file/ziroliratobitasejeg.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_off0000b9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F9 11196 bytes
SHA-256: 867ee28006c75c76eba880e74aaa4aa175cb57cf796bdcbdf3235bb4397d419b
font_02_sfnt_off0000ebe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE0 17356 bytes
SHA-256: 04454943caec1e221678aefbfb0599ae546397a18868a60e8afa889a2b2e0863

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