Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0df284dd7c7eba3…

MALICIOUS

PDF

70.8 KB Created: 2021-09-26 10:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 65bbf9b1dc5d73efff7a69a2e801bb68 SHA-1: bf29db32fe4aa5ebab2486d5e07fe12e1f67b174 SHA-256: f0df284dd7c7eba3e1c965ccdc16c98da618f0f2e8f397f6a0a78b0cd12b70cf
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable hosting or compromised sites, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and link farm nature align with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://irlanc.ru/uplcv?utm_term=rapid+planning+method+pdf PDF link annotation
    • https://plasy.com/uploads/file/vajolagutosokiwekovoro.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/77003645760.pdfIn PDF document text
    • http://miet-boot.ch/images/uploadedimages/file/warafajejuw.pdfIn PDF document text
    • http://protok.pro/upload/files/13404643627.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/51792468088.pdfIn PDF document text
    • https://zzhqhi.com/d/files/33857091074.pdfIn PDF document text
    • http://cutskytools.com/d/files/majebofikipuridas.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/15910224466.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/tofebaxakomalit.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/6066753936.pdfIn PDF document text
    • https://curtain.jinware.com/upload/files/96516779644.pdfIn PDF document text
    • http://geometramaurotozzi.it/userfiles/files/26110755166.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350681c8f31---78994780221.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161323546a3f53---41186345245.pdfIn PDF document text
    • http://www.neoneophytou.com/ckfinder/userfiles/files/fudisekix.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/41836178962.pdfIn PDF document text
    • http://skncn.com/u/files/67158663128.pdfIn PDF document text
    • http://viethanit.vn/hinhanh/file/bewofeg.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145312ed593a---jakiradijuwowikurifox.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/29690364535.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/94767283924.pdfIn PDF document text
    • https://ncltandatbar.com/home/ncltandat/public_html/dowalumniusa/ckfinder/userfiles/files/86565126631.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/kevaz.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/toxomezisutadabejolusivus.pdfIn PDF document text
    • https://anjingliar.com/contents/files/wasigepexo.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_off0000b3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3BE 10724 bytes
SHA-256: f48ec79c6c672c2b11605cbc7f91a7b42777b65806d0ec785234a68863444545
font_01_sfnt_off0000cbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F0 16256 bytes
SHA-256: cccf4c368ab867c87775f6aab755606107649c962caff84c2d2a34985ad9bb3b