Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf7e1dd0f21a6c8…

MALICIOUS

PDF

80.2 KB Created: 2021-09-06 16:31:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c18bafc6e3f195ce4833189cd12af71c SHA-1: 678cab02cea11f23f50a3511da8738694bad6030 SHA-256: faf7e1dd0f21a6c876e38989f811c277ca46dcd55f179fe8d98b0bf9699cdd54
164 Risk Score

Malware Insights

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

The sample is a malicious PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also features numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely involving exploitation or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • 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://oniceh.ru/uplcv?utm_term=sonic+the+hedgehog+genesis+manual PDF link annotation
    • http://bagiez.com/userfiles/file/14212831415.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/10755105889.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/5iltfmd6lgo5k9c0dpm1rengb5/zapujatulif.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/4ee9346b91887c2a2bfb47b2d5ae590d/ralegigi.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/79262509458.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3756447a86---befuw.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/81914866585.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/8e3df98c243c8f09f27f578b2a20c991/3672940472.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/bijepisoxisomubonowerija.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/zatemi.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107e046b91ab---3737610555.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/92a5113c215a29ee75bb3031c5e98913/32674420762.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/fa8jqs8akmh9acgeqpdolgi0ue/mirosudupaxurifefejule.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/66983626208.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/zijaxalidopabaweripeze.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/63818415827.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608c281479de3---44073998191.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/kagimazowiti.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/tibejojubegiwugejos.pdfIn PDF document text
    • http://brbud.pl/userfiles/file/30471109098.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/80f6dc60a8b7ff15fa2dda4b54e82722/vefukoborileguwexijebi.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/41333256195.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/86332481748.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1611806140750d---bagekasogibi.pdfIn PDF document text
    • http://bbbswalkforkids.com/clients/c/cf/cf8d0549bdc9bbdffca8bc0db9808b96/File/femigopotivari.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_off0000d1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C4 10892 bytes
SHA-256: 80525b96fd82e57a96fcc878574c295a498a752dd775baec147b30159e89346f
font_02_sfnt_off00010289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10289 18360 bytes
SHA-256: c38b206992b5be4d5f7fd6fcee49f6c7c75e66386d34d41d651d885524844b8d

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