Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0d6350b1b066df…

MALICIOUS

PDF

92.2 KB Created: 2021-07-17 07:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9ecd65537fdad3923e2cab982755ff65 SHA-1: ef2b4395c36feefaf298792777eaf20b130b4680 SHA-256: 1d0d6350b1b066df690c69cdb39f5d5c2bf75455a0b9f739dcae285c93492ffb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076067e1ff1b---56793437811.pdf In PDF document text
    • http://anandtouristcorporation.com/uploads/dixizixaxuzulidaxotizotod.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/c811c6bfc90fbaef123530845a6e25a3/81038332247.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc1bced097---36003945523.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/lmgmi5vl83vmq61c5f0in3ao71/3206559192.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768c1a62b93---pojarunetabaluziximalex.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/958fec74ded1c65a7fb1f069c80d0a6b/wusaxetadusupefulesibu.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210617141023.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210620135103.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082acf5f154d---63042407786.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbffa531369---39246893649.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/rebivafukajosunixigudanur.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be02b48eb0b---pofezabasuwoweligexiwutan.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/c63ac10de67022a30eda70283e807477/pozidudofebujoguzopu.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/ai78h40vadlmj6i3dspg2f5p8s/65832514193.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/91834566742.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/53565202896.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef21943f29---97767227061.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/32584257674.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/welabuvisidanosum.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7b08d45e9---6950060421.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/89440226574.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/labixilexogopupapunefusaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=evaporation+at+homePDF link annotation
    • 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_off000106b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B5 17116 bytes
SHA-256: 397bbd566e8db199232658cb66897c6fbeb08cae6f0c7010d5ed21faf3144d66
font_01_sfnt_off0001335a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1335A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B71 10352 bytes
SHA-256: fd1411f2336c33283b1cd2e61b91002689e41df5c1351a5efa173190975e5a64

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