Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d054612297a17c4…

MALICIOUS

PDF

81.3 KB Created: 2021-09-24 10:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 02c5da485966765854c1e6831a74a591 SHA-1: cfc2d5cd2786aa9cec7ffc2456b02a5df65da92e SHA-256: 2d054612297a17c4dc7f04e7b62c4817ac81aeb3732ba590af59336becfdbd03
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is structured as a link farm, with many links pointing to unknown or potentially malicious domains. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the interpretation of this document as a lure for malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lawyersmarketingusa.com/user_upload_image/file/ In PDF document text
    • https://nmg.lv/img/uploads/files/puvetawunajid.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/xelubofofunowufa.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/23978145832.pdfIn PDF document text
    • https://www.kuwaitpolyurethane.com/ckfinder/userfiles/files/81021131283.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/53837204433.pdfIn PDF document text
    • https://rajatotogroup3.com/contents/files/nivujex.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/puwoxevumoxobarexobinu.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/zojuzubizokitobewudefivab.pdfIn PDF document text
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/88730556628.pdfIn PDF document text
    • http://platypusspot.org/uploads/ckfinder/userfiles/files/50849025347.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/sebex.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/ziwutekivofodedawudaf.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/89256198170.pdfIn PDF document text
    • http://dh-cell.com/ckfinder/userfiles/files/miwitobajegevesudetuwuvo.pdfIn PDF document text
    • http://shiny-baby.com/fileimage/file/mujuwikozidetufuwit.pdfIn PDF document text
    • https://goldgreiner.de/userfiles/file/libalufubokizu.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/1cdb8ba283e99d8acfd17e1c10e3e7aa/sagujaxuvuxisema.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/vafog.pdfIn PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/21806712125.pdfIn PDF document text
    • https://www.autopsrus.com/ckfinder/userfiles/files/49752624016.pdfIn PDF document text
    • http://oskarmak.com/userfiles/file/wiwikebedupebos.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210918165050056.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=download+apk+insta+downloaderPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED06 10564 bytes
SHA-256: c14a4ef875e39ca7d162ca067034f3a0a1000c4e61a48e269ba8d022a6e9ef38
font_02_sfnt_off00010549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10549 19032 bytes
SHA-256: cc39ea8c3ac83821f0c7e2e676e11d7aff539f0d461e3ed058b08434bba71534

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