Malicious PDF — malware analysis report

Static analysis result for SHA-256 791ac03c6ac7d1d6…

MALICIOUS

PDF

94.1 KB Created: 2021-07-19 20:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5372b04eb7bc2c5b57bde00028907fd8 SHA-1: baa5cb3f4e626c2c2b6b7f420543138fc21752b8 SHA-256: 791ac03c6ac7d1d6c4ec592f37eff0677ac237e0c836129f38f1eb2705c6d78a
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains, which are commonly used for phishing or distributing further malware. The presence of these links suggests an attempt to lure users to malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

Heuristics 6

  • 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.
  • 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 http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160729834cbe96---62695267183.pdf In PDF document text
    • http://budohurtsa.pl/userfiles/file/8536044409.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abda0f7a1f9---sokoberute.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/5ec1cf455c7c389cc47f3cdd708ef3d9/52762599699.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160d61df34e40c---59361448066.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/bituzimimegizokuxes.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/64376932953.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ab72734ba---zugezim.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/rotutesiwu.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0228f2739---lifukasazexisulodejoku.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0f94b7844---banorinad.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c432ae1a583---40764419440.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/fakolawizafava.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075e2c515cfc---zitusarubivedobisipa.pdfIn PDF document text
    • https://lanna-flyingclub.com/ckfinder/userfiles/files/ponogatozazozigodibebete.pdfIn PDF document text
    • http://www.dilipprabhavalkar.com/images/file/tafufisupidinifu.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/c28e1b9d0e058ed93910f4e0356b186a/8164580708.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210624112232.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/76497993884.pdfIn PDF document text
    • https://bosingels.nl/ckfinder/userfiles/files/belebixaditixi.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/89474187695.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/rirumasunusotesula.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/2ca9f7cc14b7260efc3d8a47d5264e2e/paloniwiwozotisujo.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c41a26f088c---xevesapimoni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=bts+thoughts+in+englishPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCB 16252 bytes
SHA-256: 21912f87dcaec48b6e0c449e0a54189134bca2ffce3fe978b6d9ca1e388cddbe
font_02_sfnt_off0001239e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1239E 10276 bytes
SHA-256: 88b834372a81b4124825194837e867ff2e424bd43c0b48cb470bb14c0b69540b
font_03_sfnt_off00013ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB5 17464 bytes
SHA-256: 95c782dff12301b71cd2f3d137facf606db42806f4de58193f5e15ad31f61958

Open this report in the interactive analyzer, or submit your own file for analysis.