Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fee8a79890d7afc…

MALICIOUS

PDF

77.5 KB Created: 2021-02-08 02:49:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 6d2fe6943926e51bc0476f17141db5b1 SHA-1: beeec53a336a93761e28f450a109860f24667090 SHA-256: 2fee8a79890d7afc4d321776d176354b8cc2a32ac155220963c9ef33565c31ab
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://yafferge.ru/123?utm_term=how+to+fade+out+music+in+garageband'. This, combined with ML and ClamAV detections, strongly suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the nature of the redirector implies an attempt to download a second-stage payload or lead the user to a malicious site.

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/123?utm_term=how+to+fade+out+music+in+garageband In PDF document text
    • https://cdn.sqhk.co/nuroteditu/49XqBmx/saxesabosuzijiselenumoji.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/hghieja/paintball_sniper_rifles_bolt_action.pdfIn PDF document text
    • http://austritkfa.com/74839808687horzt.pdfIn PDF document text
    • http://sberpodarok2020.online/65336904905lut1r.pdfIn PDF document text
    • http://kesenirevapovid.iblogger.org/netflix_for_smart_tv_android.pdfIn PDF document text
    • https://cdn.sqhk.co/jifegusewe/8F5DDXG/86813100611.pdfIn PDF document text
    • http://a1metromovers.com/playmobil_ghostbusters_cartoonp45a7.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/conflict_of_romeo_and_julietbq1wa.pdfIn PDF document text
    • http://wegijezunulej.22web.org/appdata_mozilla_firefox_crash_reports.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/bubisifapagefe/gugus.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/libevopesapufivemiw.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/algebra_2_textbook_mcdougal_littell.pdfIn PDF document text
    • http://gobonelore.epizy.com/fisabiteja.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/71643432459.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/finezikavepinode.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_off0000f17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17F 5504 bytes
SHA-256: dffa5ab7c985b60bf88cc809adc3135c420d7d9e4b361e29f26e26a2b09a55ab
font_01_sfnt_off00010434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10434 10732 bytes
SHA-256: 7dd1ae7c3f3576577d881fa5a362e2031dea66dd5019584468dc605cbd73850a

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