Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8949667ce457216…

MALICIOUS

PDF

100.8 KB Created: 2021-06-28 15:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 49def60a46f8f2ddd38238630e28de85 SHA-1: fd989b9068b7d4a40751af297690a244c6eccf36 SHA-256: f8949667ce4572162eb6af3f6455add40e64b5eee9f016db11f03ce54dd788d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, indicating it is likely a phishing or malware distribution lure. The numerous external URLs, many pointing to compromised WordPress uploads or disposable hosting, suggest an attempt to redirect the user to malicious content. The ML classifier output of 0.971075 further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9711

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://huntic.ru/uplcv?utm_term=present+perfect+of+forget PDF link annotation
    • https://aslimitada.com/userfiles/file/68263143574.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084225aac3ea---sudefinaxebofiluxiwo.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/gaxoserobevo.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/dd712a23e2e68facde7b4b2d178edf66/66428557570.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084adcd3719e---vunimafetakudibazare.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607284fe0c936---88171740643.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/501ab621bf2b624956239261abae2a4f/gajak.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/wipaturudawanobababuz.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/rawofojaxuxevoxakesabemoz.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160719fa52da41---23706619634.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86cecd444a---bikiwatebita.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/c1e23456699ff2cc76531c8632be9f4e/gofuvivitojobumulozug.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094e58c5ae4a---karetixosow.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/83000483801.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/ritodaxelirilurazi.pdfIn PDF document text
    • http://apcmagon.com/userfiles/sazasitubarugerojowizub.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/7d548a0037da14d119262e4d28c777eb/18316709331.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a688903b360---vofasetagilodevixagi.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/98853822117.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/r15oc4tu643e8m2iqdl28f0pl0/kejinepopaxabadig.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608600b26a9d4---javez.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/7ffca6adde2c721e8b67bb2a181be10e/17078954149.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a485d2a8eac---valitakowufodikaveb.pdfIn PDF document text
    • http://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/pubuwolusa.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E8 22324 bytes
SHA-256: 5c3d6ac487fa98539d578f57e414811437cd32ad0e314aa829036f3ebab2c8ee
font_01_sfnt_off00013130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13130 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14941 16520 bytes
SHA-256: 5e6d335c1f38bd22a6c5694f01a57af7fb0edc62381c99cb255999dbf0413764
font_03_sfnt_off00016031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16031 10356 bytes
SHA-256: 36aa968a798f92fe7173cdd82599fef766270b075ae9cebcd961c2987055b564
font_04_sfnt_off000177b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177B6 3308 bytes
SHA-256: b3ee4ba270cd40a54d1d723b33545f4c44e6ea1969b3199c2bc44f8913b3dc0e

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