Malicious PDF — malware analysis report

Static analysis result for SHA-256 7740b98e8f66b45d…

MALICIOUS

PDF

67.0 KB Created: 2021-03-05 10:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 644d50a8eb6920d1244552d872d9b70d SHA-1: 7a6a83a1a915639045739266e2a26d40a0bd7e3b SHA-256: 7740b98e8f66b45d0806c1f4b83a04fb8d1e9aade9871af3a246a3dc89889771
154 Risk Score

Malware Insights

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

The file is a PDF that contains a malicious redirector link to 'https://yafferge.ru/strik?utm_term=nexus+geo+release+date'. This heuristic, combined with ML classification and ClamAV detection, strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the presence of a malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/strik?utm_term=nexus+geo+release+date In PDF document text
    • http://kipokefurur.mygamesonline.org/age_of_the_rebellion.pdfIn PDF document text
    • http://bamirajewenexo.medianewsonline.com/crochet_stitch_chart_printable.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/ditegufatane.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/ruljhhd/extra_life_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zugivakizo/jdvia1x/30589929538.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/migALhd/which_literally_means_love_of_wisdom.pdfIn PDF document text
    • https://cdn.sqhk.co/vusanutoj/idjhgcC/ark_survival_evolved_wiki_creatures.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lawakux/roll20_5e_character_sheet_armor.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/29915903349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ead9c712-8c13-4bc0-a002-dedbc4f71af5/what_does_religious_tolerance.pdfIn PDF document text
    • http://viwuwijagabote.myartsonline.com/moluxudigot.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/bsnl_recharge_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e1dad8c-9465-473f-b782-755adb2b6e61/nufaleb.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/liquidating_trust_tax_reporting.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/70341786555.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/backup_android_and_restore_to_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39627ab3-5f31-45a6-9a6b-c60d5200b35c/computer_hardware_tools_make_an_acrostic_of_skills.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/45773860912.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/chain_guide_bicycle_srl.pdfIn PDF document text
    • http://zutugidod.onlinewebshop.net/66603923356.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1C 5028 bytes
SHA-256: 3be437d8947116ba4b04fbbe99ec68b3b6c2c589c66a883378e0a7b961358310
font_01_sfnt_off0000dc4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4A 10092 bytes
SHA-256: 0e525a777dfdc72f313e696a231cb302955421b80f44e7da42b497657b99ec7b

Open this report in the interactive analyzer, or submit your own file for analysis.