Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e86f54c5583131e…

MALICIOUS

PDF

79.1 KB Created: 2021-09-12 13:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: aaae960fabe671225c5604a327db7b40 SHA-1: 308a5699c602780feec7624e482d79a257fee265 SHA-256: 0e86f54c5583131eb47bd5a3c3fc1e85e5dbf2191068ba4f0fde12ad0f5eaf61
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF document identified as malicious by ClamAV and an ML classifier. It employs a social engineering lure, instructing the user to install a browser extension or update, a common tactic for credential theft or malware delivery. The document contains numerous embedded URLs, several of which point to potentially compromised WordPress sites or disposable hosting, suggesting a distribution network for malicious content. While no scripts were directly extracted, the nature of the lure and the embedded URLs indicate an attempt to execute further malicious actions, potentially involving JavaScript or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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=transfer+data+from+old+android+to+new+iphone PDF link annotation
    • http://ebd.su/UFD/7623/files/17944461838.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/14599272371.pdfIn PDF document text
    • http://orvositudasbazis.eu/images/upload/file/91793587540.pdfIn PDF document text
    • http://marasintl.com/public/ckfinderuploads/files/luvetetexafigagonadiw.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/15014475423.pdfIn PDF document text
    • http://mariondhuique-mayer.com/data/file/telosuxilodijapusa.pdfIn PDF document text
    • https://academiapreprod.riportico.com/userfiles/files/sulakazatatiriwupage.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130534d57544---zovesuwiturujopivumoki.pdfPDF link annotation
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16135e85f08474---44251732395.pdfIn PDF document text
    • http://studioesflores.pl/obrazy/file/vovewepowavifeje.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/17313764884.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/fevidejewowevivomewimavif.pdfIn PDF document text
    • http://furniture83.com/upload/files/zijuwadukivejunixatafarel.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16131ac4340fdf---78799237056.pdfIn PDF document text
    • http://warehousetraining.ie/images/zukedetibobulinalazirijut.pdfIn PDF document text
    • http://uteambio.com/upload/files/kapevimofuteka.pdfIn PDF document text
    • http://ahchala.com/img/file/nupijobokerofalabawanigu.pdfIn PDF document text
    • https://www.lucaslobker.com/minor/ckfinder/userfiles/files/16815158674.pdfIn PDF document text
    • https://ambalatender.com/upload/files/rivawafudojotibimuwiteriz.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161317fece3f72---67391755737.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/35689785528.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/7642729139.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_off0000d0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E1 17652 bytes
SHA-256: 283de030bfa03f04766a3ab4bd98a4e029c3c2f71d891c3e38af36cd795a9a68
font_02_sfnt_off00011669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11669 10812 bytes
SHA-256: 48479a1b77050e0203a027fd0be574265efb6b32e87902319af25faf15e30f35

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