Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba7be8472cc4782b…

MALICIOUS

PDF

89.4 KB Created: 2021-09-15 15:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 920ab686eec874a2d959e77dcd67d738 SHA-1: 2d1c4b75354ae78e1cb977622596ced3b69be800 SHA-256: ba7be8472cc4782bdcc0c4f7a4c48c128707bddf1ad96390af49c2ea9894069c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to potentially malicious content. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous URLs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 5

  • 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=application+tablette+android+pour+senior PDF link annotation
    • http://jujucuisine.com/userfiles/file/kebiretilezebefolekolala.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e05fc07a8b---66776037179.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134f35083710---lebevamoga.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613e89645b58a---28733961609.pdfIn PDF document text
    • https://taptigrihnirman.com/singhania/downloads/file/wobopifidog.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210914052222883065.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161410fbc593ac---36283947388.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/82921516367.pdfIn PDF document text
    • https://gsacademy.ge/uploads/files/39830582744.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/nezuwamefefewetemasuzo.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/47687963042.pdfIn PDF document text
    • http://asesoriazabalburu.org/azaba/files/file/37926056410.pdfIn PDF document text
    • http://sinoorchids.com/image/file/widixav.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/6894533806.pdfIn PDF document text
    • http://klpa.net/userData/board/file/69710861643.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/21645205882.pdfIn PDF document text
    • http://belniig.by/public/file/91011351977.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/62668280075.pdfIn PDF document text
    • https://a-metal.e-giant.net/archive/file/files/3814211904.pdfIn PDF document text
    • http://oticonshop.com/ckfinder/userfiles/files/zejesajugulugemepuxotawaz.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/furalujaremuratijimo.pdfIn PDF document text
    • https://mystruggle.uk/indigo/ckfinder/userfiles/files/xamokamepaduwoxajoso.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_off0000f399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF399 10728 bytes
SHA-256: 4ea9f4223b96c98138c20a4e62277cb04caebe2b035339485c351a2d2d3c5d18
font_01_sfnt_off00010c2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2E 20160 bytes
SHA-256: 0d983abc92bb0e4143adb073c22de4f1cda993b29bfefacae8882f38bcd6d8e3
font_02_sfnt_off00013e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1