Malicious PDF — malware analysis report

Static analysis result for SHA-256 80453bda1acdb75a…

MALICIOUS

PDF

76.8 KB Created: 2021-03-19 17:20:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5990ae45b24bc65901ae3c1cf2baa7f5 SHA-1: 55b121a56edea61d830f446626a3f34c0271e2d4 SHA-256: 80453bda1acdb75a8ce235176cf4b7ab2415c44117faed5c48119f5eb7d38cbf
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent link leading to a domain associated with phishing and malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/123?utm_term=kaleidoscope+world+lyrics+pdf
    • https://cdn.sqhk.co/mojikeke/jfI8zD2/followers_for_instagram_app_apk.pdf
    • https://wizisenax.weebly.com/uploads/1/3/4/3/134320615/1569609.pdf
    • https://bizekexejanagiv.weebly.com/uploads/1/3/4/5/134593847/pivovasejugete.pdf
    • http://pigozolifafaw.iblogger.org/puzesox.pdf
    • http://xekilekugud.iblogger.org/muvupogafosirir.pdf
    • https://cdn.sqhk.co/zejizoguzut/idTltgd/costumes_for_men.pdf
    • http://tanitebose.22web.org/vowosolozokijufajures.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vutame/acurite_outdoor_thermometer_not_working.pdf
    • https://s3.amazonaws.com/sobaketemu/mademefalo.pdf
    • https://s3.amazonaws.com/gateme/icom_ic-718_vs_alinco_dx-sr8t.pdf
    • https://s3.amazonaws.com/fadupazageraf/49834768374.pdf
    • https://s3.amazonaws.com/robumuduluwise/mikuni_carburetor_rebuild_service.pdf
    • https://s3.amazonaws.com/fuwuzerijofa/monster_hunter_4_ultimate_insect_glaive_guide.pdf
    • https://s3.amazonaws.com/retobifulipo/jedig.pdf
    • http://folezazav.epizy.com/7492258626.pdf
    • http://mixomexazuvoxod.rf.gd/girimepiw.pdf
    • https://s3.amazonaws.com/donukadizolin/lurusivobotowolomot.pdf
    • https://s3.amazonaws.com/nupotukig/49815346270.pdf
    • http://wepegiw.epizy.com/why_does_my_tv_say_no_signal_when_hdmi_is_plugged_in_samsung.pdf
    • http://dipijiz.epizy.com/charts_and_graphs_worksheets_2nd_grade.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d56f.bin
df81b2ac51eaaa3f7ad96309c59a2141c19f6ebd6683dff7bd451ada3c614c43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD56F 4916 bytes
font_01_sfnt_off0000e648.bin
a397c99fba0e47a5823b98702d751ffcad5d714ce329e5ad92c3da3ea2ddfcaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE648 6124 bytes
font_02_sfnt_off0000f630.bin
2f836a40478dc2c04a2ca3c4e457dbe5c47dd016266ffcb3744011dfbfc04cc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF630 9736 bytes
font_03_sfnt_off000117a3.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117A3 4324 bytes

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