Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0e48728c9512e7…

MALICIOUS

PDF

71.0 KB Created: 2021-09-06 21:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 48bbf0e3ff9c713c56d673ac59a58075 SHA-1: 917aa6851fa32ad3ecb640bd995e3047a569a766 SHA-256: 8e0e48728c9512e7cdd07c4a211aa4e9bca3b5ff23df05bce5b677ce74079b5a
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or engage in SEO manipulation. The presence of multiple PDF links and the overall structure indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lescourailleurs.com/upload/editor/file/sogelugizajuxode.pdf In PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab35547ec6---76846632254.pdfIn PDF document text
    • http://jeanthompson.nl/ckfinder/userfiles/files/lalopuv.pdfIn PDF document text
    • https://kham.vn/userfiles/file/danufikutaturerorobe.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/22142644276.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/kd179mjavftg8ufj80oeegqeah/46133950555.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/889a6611a833035be0d9fc385150136b/wexinorodug.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/3a0beaf3cee23d1b68fecb207aac8133/sigikanevulakokajavalajux.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/joratur.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/23468671550.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/puriwezigadojeda.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608083607a1ad---misozidubutusetogu.pdfIn PDF document text
    • http://beta-rc.com/upload/files/dilomokirilonofomegosex.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/sogewepunulinaxakodenul.pdfIn PDF document text
    • http://bwc.lt/i/92892473604.pdfIn PDF document text
    • http://www.tractortools.cz/ckfinder/userfiles/files/56330336304.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/files/69908991954.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/74d0407aa40a213995b0303f575c5fa5/72425540725.pdfIn PDF document text
    • https://oglethorpeclub.org/~oglethor/UserFiles/file/66665621449.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/2f2b644e9c1a8da4ac6956390d1eac8b/7976173802.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/sifavujowosedanepejises.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/kovadowozumumenonefojogap.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc705033a7---numavegaxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=binary+fission+prokaryotic+cell+cycle+worksheet+answersPDF 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_off0000b417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB417 16096 bytes
SHA-256: 34cd765cb1cc1cc5e985f94cff0b00407ffa82752ae0387b33f98cb8307f7305
font_01_sfnt_off0000dd12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF529 10920 bytes
SHA-256: 8110c846dca5fac262978130a421cdcc89ebe5a644176a9361345eaf74b6aac3

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