Malicious PDF — malware analysis report

Static analysis result for SHA-256 addfc83be16567c6…

MALICIOUS

PDF

79.9 KB Created: 2021-04-01 15:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1939276f7703512b53ff1b764613ba0 SHA-1: 7f4539e3625227fbdc69829a82a839c9811c5472 SHA-256: addfc83be16567c6a317bedebef159eb3d2352d3f7a9bb59c8e54f0c53b3fa1d
136 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an invisible link pointing to a suspicious domain, designed to trick the user into downloading a secondary malicious PDF. The presence of external URIs and suspicious links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://maypoin.ru/wix?keyword=apa+article+review+sample
    • https://cdn-cms.f-static.net/uploads/4423431/normal_6063d68fba715.pdf
    • https://static.s123-cdn-static.com/uploads/4374542/normal_5ff476412f748.pdf
    • http://hookup668.site/mefajaxufinamuzagiz8zj79.pdf
    • http://securitycheckingbrowservkcom.xyz/koi_bubble_milk_tea_menuguv8t.pdf
    • http://fito4ka.xyz/spirit_runeword_flailkt4u5.pdf
    • http://sportplays.ru/how_to_calculate_the_net_cash_flow_from_operating_activitiesjkxuk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vekifaxofezawe.epizy.com/wadebozubebazawala.pdf
    • https://s3.amazonaws.com/vavapekadoliti/9535893878.pdf
    • https://s3.amazonaws.com/likerajatob/30_days_of_discipline_victor_pride_download.pdf
    • http://rufapapufogap.onlinewebshop.net/86070134757.pdf
    • https://s3.amazonaws.com/temujonuwu/spoon_river_belhaven_nc_facebook.pdf
    • https://s3.amazonaws.com/wunojipu/artifactory_pro_docker.pdf
    • https://s3.amazonaws.com/dapekufoxiraku/82409948354.pdf
    • http://paduwovipubu.epizy.com/4813649859.pdf
    • https://s3.amazonaws.com/wutisigila/80073937418.pdf
    • http://benamow.myartsonline.com/brand_positioning_questionnaire.pdf
    • https://s3.amazonaws.com/wujixus/48395156833.pdf
    • https://s3.amazonaws.com/kefiperizonofu/kuzaxaximut.pdf
    • http://venakato.epizy.com/bevonameremeti.pdf
    • https://s3.amazonaws.com/juzewojavomofew/wanugugo.pdf
    • http://xawabaxazulaga.epizy.com/mammalian_heart_dissection_answer_sheet.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_off0000fafb.bin
5ba747f73a425c4c88520ead2dea0e609b783a9d8e879918ebf021791153d930		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFB 5220 bytes
font_01_sfnt_off00010cba.bin
987e3bee48867501af39b7a022351b034c0b7de60771646633e094564f680112		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBA 11168 bytes

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