Malicious PDF — malware analysis report

Static analysis result for SHA-256 1030fe39ffd6de61…

MALICIOUS

PDF

87.4 KB Created: 2021-06-26 02:21:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 696a006a939f5c412551b43e4d1c8d7e SHA-1: 32bdcdacc1af8aa9692545bc80927a6567220684 SHA-256: 1030fe39ffd6de61200faf446b33cb78244f08418dcb0773d61f441e6fe92bdf
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to WordPress sites that appear to be hosting malicious files or acting as redirectors. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of a link farm suggests an attempt to obscure the final destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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.
  • 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=pokemon+mystery+dungeon+blue+rescue+team+dungeons
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/831e174e1ced941f1e56de7a32b43626/vizidusukavilivorus.pdf
    • http://bosch-service-center.ru/uploads/files/95591992894.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/4cs6an65emcilije7pnf48s1ap/10843958810.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8fe3a46dc---wuluzerivedelitadasurajiv.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04b6bcb6a9---13100440212.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/3ac1e6910b03f717213fa97c9568a43c/rupafukigofano.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160983d4452c95---gelazewoxo.pdf
    • http://quickvideo.nl/userfiles/file/fowuvisisofepuvorufew.pdf
    • https://palcev.ru/userfiles/file/74017760400.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdd53dc63c---1906386585.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16087af5992a54---vugebasekijofobozigo.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/893c0f090ca00e198e9a623333cffd77/34754488130.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16077f821c5d5d---71301502019.pdf
    • http://langfordfinancialservices.com/userfiles/files/bonugigafikifanogumelimu.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/75d596293e1d3c107be991e7c31be1ed/63687808084.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/309fc06e49401652b2de0080547de8ad/sutiwev.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/a0c00f6e506374818e60edd1fb72d2db/nokijerotivewedoviravedi.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/7def99ce54380563768a8683068f6687/37327616104.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/rel1ne47vml6ha609ca1mjcvft/42908000494.pdf
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/nizekimewetinomul.pdf
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a700a42351---17369864363.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32643ce3b9---lozapovidiliwatum.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/ffede73ed305d22fa6105369b576d785/nodesobujomezogupapewi.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9e2235e56---nejimelowikagixire.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed7b.bin
52ad41c7de301f8505689ad9421a49c84965a5cd43f0e90e5e70a4ff536f75ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xED7B 17964 bytes
font_01_sfnt_off00011c9a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9A 16792 bytes
font_02_sfnt_off000134b1.bin
3f5408ded8c337d0055e564656b31c60c9aa347e92d9d0d745c086cd25c25a04
pdf-font-stream PDF embedded font (sfnt) at offset 0x134B1 11068 bytes