Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d32208bd46cb16…

MALICIOUS

PDF

70.7 KB Created: 2021-09-19 18:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3bc0ae4e242dd00fc218336f92ea36f8 SHA-1: 904ef3d28a1434d2a5fd3bda31911d3d01d3b1fc SHA-256: c7d32208bd46cb165f9edc5b01da2976e7c6851125e28274b82a79b13b41942c
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm. The document body is heavily obfuscated, preventing analysis of its specific content, but the overall structure and URL distribution strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://scpt.it/userfiles/files/mifazedekitogudorez.pdf In PDF document text
    • https://dianthusindustrial.com/resimler/files/baralifikadevikepamoxa.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/zivubilujalikuzed.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/68571286186.pdfIn PDF document text
    • http://autoachtercamper.nl/userfiles/file/zunovosulex.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/xixemebukoxu.pdfIn PDF document text
    • http://ersenergy.com/UserFiles/file/fudeponasalavilika.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/bufukegiwunezepasewe.pdfIn PDF document text
    • http://vvk-wiedermann.at/userfiles/file/23395601330.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/2aso58c268ssthdlvbsmuhrnk6/savaxifotizolaru.pdfIn PDF document text
    • http://music-saikung.com/ckfinder/userfiles/files/53879736429.pdfIn PDF document text
    • https://luatsubienhoa.com/upload/ck/files/memefoxugotomujuraw.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/49284594164.pdfIn PDF document text
    • http://mrs724.ir/basefile/drtiketcom/files/51584500472.pdfIn PDF document text
    • http://c-six.it/userfiles/files/gakenovaxipigatewofidob.pdfIn PDF document text
    • https://rajatotogroup4.com/contents/files/98495501039.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/30460151102.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16143bdfa59540---fizidusop.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/80886756295.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/dilubunujepivanedima.pdfIn PDF document text
    • http://snft.ro/media/file/bivoxasoxebor.pdfIn PDF document text
    • http://vsrru.ru/userfiles/file/fumeworaxa.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/rudujosojogozinim.pdfIn PDF document text
    • http://cowmoo.org/ckfinder/userfiles/files/50625061279.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/46009754892.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=apple+rom+for+androidPDF 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_off0000b6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ced1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED1 10376 bytes
SHA-256: 43088bcf8228a20752707422df12e11b05e5f6b0a54c02709c136bab08e5b045
font_02_sfnt_off0000e62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62E 15572 bytes
SHA-256: c81760912e55033aa2ccf49ae93492b0f7083a348da9c5afabfcce74a6e6f1f0