Malicious PDF — malware analysis report

Static analysis result for SHA-256 623c94a64b732a36…

MALICIOUS

PDF

69.4 KB Created: 2021-03-19 23:20:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cf00ce597684c66e8549c775a7c3054 SHA-1: 6d8b160fc0fd0e24c196470de9c202600d7099fa SHA-256: 623c94a64b732a3622180b96644c55ad9364dfe586ff3a0c7e1962e8382390de
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a free converter, which redirects to malicious infrastructure identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the embedded URL is the primary indicator of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/award?keyword=free+converter+pdf+to+word+download+full+version
    • http://jasazotinalol.mygamesonline.org/louise_l._hay_libro_tu_puedes_sanar_tu_vida.pdf
    • https://cdn.sqhk.co/widafopaj/iaR6jjP/rijuwakor.pdf
    • https://cdn.sqhk.co/tunuviju/cOpidjb/4830461913.pdf
    • http://fonixeguga.mywebcommunity.org/13006380649.pdf
    • http://nutetuxiv.mygamesonline.org/central_park_5_interrogation_techniques.pdf
    • http://mesanezedid.mypressonline.com/29381503472.pdf
    • http://bosemefawixuwov.mypressonline.com/5662289668.pdf
    • http://suzamajotibe.mywebcommunity.org/cctv_camera_installation_diagram.pdf
    • http://fekosuse.getenjoyment.net/vineland_3_manual.pdf
    • https://cdn.sqhk.co/fusajovogi/jg1Ejaf/68845839116.pdf
    • https://cdn.sqhk.co/fekerepusa/iakEgdP/tuvamotofusamabujonu.pdf
    • https://cdn.sqhk.co/pesegozod/hdGhagj/wafefini.pdf
    • https://cdn.sqhk.co/mixagumidis/h8jhoP7/28625165117.pdf
    • https://cdn.sqhk.co/xenivoronizu/fE4hdUs/baby_yoda_dog_costume_petco.pdf
    • https://cdn.sqhk.co/javeduner/hgcjagi/jowafu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://figaniver.epizy.com/guidebook_definition_in_literature.pdf
    • http://jefokid.rf.gd/zarisirasuw.pdf
    • http://namepafubi.atwebpages.com/ps_form_3602-ez_fillable.pdf
    • http://kufekisawisewo.onlinewebshop.net/nuraxure.pdf
    • http://redifigikutusoj.myartsonline.com/drawer_meaning_in_bill_of_exchange_in_hindi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1ea.bin
599a650d84050afeabb61b44ea72f041beee71021f835ba4214762ce04c350a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1EA 5256 bytes
font_01_sfnt_off0000e3f5.bin
273be14de5e1d5d494c32ee3412e69562e7c4f237a7618b6d125053998fdd609
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F5 10508 bytes