Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b12a46ec0c0e59…

MALICIOUS

PDF

83.5 KB Created: 2021-09-18 09:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2d6c7b294ca02a7406ea2375d120fbc1 SHA-1: 8fdb55221f5a3b143c36bb3b7012b3c8231939dd SHA-256: 86b12a46ec0c0e593b692a44d55a4b8860cf1c73289f6f966311dab6af7cfa04
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs and links to compromised CMS upload storage, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure points to a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=list+of+beyblade+qr+codes PDF link annotation
    • http://architettotamborra.eu/userfiles/files/fikebomom.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/demijisag.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/fea1789d185891eb366aa2fd1a972813/60310052629.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/73694099576.pdfIn PDF document text
    • http://ms-krmelin.cz/app/webroot/files/files/xedevuluxiru.pdfIn PDF document text
    • http://rideco.hu/upload/file/domavapanebofatu.pdfIn PDF document text
    • http://centronegozi.com/public/92772579621.pdfIn PDF document text
    • http://annamsaigonlaw.com/upload/files/gawofodetokigufudezozupog.pdfIn PDF document text
    • https://reha.bg/content/upload/file/kepofope.pdfIn PDF document text
    • https://tefen67.com/userfiles/files/wupasakofolise.pdfIn PDF document text
    • https://reviewz.eu/app/webroot/files/userfiles/files/jibojujotoxixafotadolepa.pdfIn PDF document text
    • https://jagominum.com/contents/files/dotidefufufuvagegoga.pdfIn PDF document text
    • https://maria-galland.ru/files/file/jisapuxumodozozome.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8e6e01401---vutule.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16141d5337d929---94065162079.pdfIn PDF document text
    • http://huonglonghotel.com/uploads/image/files/pasipajodaporewu.pdfIn PDF document text
    • https://cheeselicious.net/UserFiles/file/nojotoxitixikodeguvepu.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/fofonukubegesuxife.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/74598629517.pdfIn PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/95852379433.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/sivitaz.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/fimivolisodekopixaguz.pdfIn PDF document text
    • http://xn--brneneskontor-landsforening-b0c.dk/userfiles/file/papevafob.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_off0000e239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE239 17744 bytes
SHA-256: ab64d75ae90921c1b30d7351a76fb42e2d99bd109d08603d28c4c4357bf8ec3a
font_01_sfnt_off00011087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11087 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001289e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289E 10720 bytes
SHA-256: e803fa0ea339859100f9d8086674bc0c9676769bbc88a6215dbb5c71e3842a8d

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