Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c00cc3be39bab8…

MALICIOUS

PDF

88.7 KB Created: 2021-08-01 15:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4ae469c0e383fdf244dfc8d95fce7d2e SHA-1: f3bcedd06274211de4e6157595adc1a41e3584f3 SHA-256: d0c00cc3be39bab8a4d9a9785c945044247b8efd63ce33cf08e0fb475d5e9bac
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs that form a link farm. The primary purpose appears to be redirecting users to potentially malicious websites hosted on compromised or disposable infrastructure. The embedded JavaScript and the nature of the URLs suggest an attempt to lure users into clicking through to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=how+to+measure+slope+on+sewer+line PDF link annotation
    • http://jorkurojus.com/userfiles/file/xezodanafabavivinuretevi.pdfIn PDF document text
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/620b8c56b8e3943e98a42f63f1fac56a/mijewalo.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/83893504913.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/d71dbac140819eb6b1b3079ee2114ddb/55898897243.pdfIn PDF document text
    • http://614move.com/clients/4890/File/kipapokol.pdfIn PDF document text
    • http://hulstcustoms.ru/uploads/files/68021157976.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/sibuzovutufikuniv.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794c768d4fe---loxesimadanegovetol.pdfPDF link annotation
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/d7bc527dc05282fa1cc2f5afe2e16eee/49892179741.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/72171268641.pdfIn PDF document text
    • https://alcoolassistance-creuse.net/www/site/js/ckfinder/userfiles/files/33470963049.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c1363f62994---97461526506.pdfIn PDF document text
    • http://kanomax-nsk.ru/images/zakivovawabina.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a6968f187---jifinerisugakebozaduz.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607825cb28544---dawakelu.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/8n90rqcfa86ko09kbvsff82oso/serekibikipavimijex.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/jogajewanijiv.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/dazupomutovefexorotija.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd8fa47499---52407565479.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/i4sorrnp5ufe5en9lmd43mtbad/6787254323.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d340f2d263---99836422653.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0238c1105f---tametozigi.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/84907363941.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_off0000f923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF923 10592 bytes
SHA-256: 07a40f5690e94b97d508b3945e1f9f4c0f15159a27ef2ff9341dc153a3d777c6
font_01_sfnt_off0001114a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114A 16600 bytes
SHA-256: a4674e18ac4b69f36564392f7277190d7a1f9ba7ca15e7aad35481ddddfd0771
font_02_sfnt_off00013c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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