Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc712b2c52ebc399…

MALICIOUS

PDF

72.5 KB Created: 2021-04-04 13:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f528b846b306ace05e15f4ffdc411d9c SHA-1: 7db7c07baf4fbbd11bab10a1a0ceeafccfebe833 SHA-256: dc712b2c52ebc39919154f51f7d023838aa080fccca6818974b3d5950f846949
254 Risk Score

Malware Insights

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

The PDF contains multiple links to external resources, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'Biblia de estudio vida plena pdf'. The presence of numerous PDF links and a critical heuristic firing for malicious redirector links indicates an attempt to lead the user to malicious infrastructure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=biblia+de+estudio+vida+plena+pdf
    • http://faripofijukevom.mywebcommunity.org/99537879256.pdf
    • https://cdn.sqhk.co/vuvesanap/jQJjdhi/fuximubufuloledu.pdf
    • https://cdn.sqhk.co/goduwonon/jcz2Z63/50_inch_tv_with_120hz_refresh_rate.pdf
    • https://cdn.sqhk.co/letarezetap/CDWhbqq/bamogapewinifusofenarilog.pdf
    • https://cdn.sqhk.co/fezifoxunif/ighjiij/chess_checkers_backgammon_cards.pdf
    • https://vinifobak.weebly.com/uploads/1/3/5/2/135298549/3883c5acd4.pdf
    • https://cdn.sqhk.co/solijisivono/IW3Mjjb/life_simulator_games_unblocked.pdf
    • http://pelinebaj.mypressonline.com/californication_tab_solo.pdf
    • https://cdn.sqhk.co/kigaratak/jajigjb/sopidirid.pdf
    • http://vipimuxatomefi.medianewsonline.com/harry_potter_und_der_stein_der_weisen_hrbuch_gratis_download.pdf
    • https://cdn.sqhk.co/sojowidaz/lregeib/32134695785.pdf
    • https://pamenusunawot.weebly.com/uploads/1/3/4/0/134041165/b471ca4dd1.pdf
    • https://tifogufa.weebly.com/uploads/1/3/1/6/131637606/voxuruligoxuxu.pdf
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/2195663.pdf
    • https://cdn.sqhk.co/nuzozuni/jzXaxjc/tabletop_simulator_d_d_workshop.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://vokesakogo.onlinewebshop.net/fifexononalopebivodibezux.pdf
    • https://s3.amazonaws.com/venunamazozuzo/staff_appraisal_template_acas.pdf
    • https://s3.amazonaws.com/netinuwa/99181182763.pdf
    • https://s3.amazonaws.com/jasipefulaxiduj/61971076927.pdf
    • http://loxupobupibim.atwebpages.com/zirumadojemu.pdf
    • http://jonesojawu.myartsonline.com/agile_software_architecture.pdf
    • http://letutemoxeluz.onlinewebshop.net/believer_s_authority_study_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d045.bin
52c360e75c79cac9ea30a29b442f70ab9956ec29441215558a7d78886129b298		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD045 5068 bytes
font_01_sfnt_off0000e18b.bin
493a626735e793c6faa8196a122e7aa5be6beb36c2a590905112d860bda8a615		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE18B 10856 bytes
font_02_sfnt_off000104ee.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104EE 4324 bytes

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