Malicious PDF — malware analysis report

Static analysis result for SHA-256 c63d0fe32ab2cc97…

MALICIOUS

PDF

78.1 KB Created: 2021-01-24 18:14:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 13abe59a0ff9f96446029305dfc54607 SHA-1: cc9bf91d911ad12a016938d86af28c2f0f7f5668 SHA-256: c63d0fe32ab2cc97f32d318985e3adfd894c330cb20ab2219fd47b9af83abda1
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'bytefence anti-malware license key free', suggesting a lure for users seeking software. The presence of a malicious redirector link indicates an attempt to lead the user to a compromised or malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=bytefence+anti-malware+license+key+free+list+numbers+only+2020 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4501193/normal_5fed69a0d6638.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/gdTIzgg/jiffy_lube_locations_massachusetts.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/ZghIghO/fotaxaxunozigoxutuzamurip.pdfIn PDF document text
    • https://cdn.sqhk.co/muwesisokim/c2jcRge/31185848605.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452587/normal_5fcb381fbd553.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/cgif6gc/hay_day_pop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383924/normal_5fd84025ef796.pdfIn PDF document text
    • http://tubezadobuzaro.66ghz.com/zirosu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/defipedibe/bollywood_movies_2018_top_sites.pdfIn PDF document text
    • http://vodupuginotipir.rf.gd/caseload_monitoring_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/59165029295.pdfIn PDF document text
    • http://legofovivaxom.epizy.com/26787175973.pdfIn PDF document text
    • http://gevewodex.epizy.com/81957308634.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/excel_flowchart_template.pdfIn PDF document text
    • http://lazumibuwa.rf.gd/7434039615.pdfIn PDF document text
    • http://gebutetivifupa.epizy.com/bacterial_culture_lab_report.pdfIn PDF document text
    • http://tunawibiga.rf.gd/sewatidanuvimida.pdfIn PDF document text
    • http://vatifijagix.epizy.com/korafuj.pdfIn PDF document text
    • http://kuporalegumema.epizy.com/acoustic_guitar_headstock_template.pdfIn PDF document text
    • http://tibibexubedumu.rf.gd/piluzeke.pdfIn PDF document text
    • http://zojofat.epizy.com/magazine_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D1 5660 bytes
SHA-256: ded5ffa9db5b65ecd4fb22a196414296284976c1065962aa240b17e074d0395e
font_01_sfnt_off0000f81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81D 10524 bytes
SHA-256: 15d9f76ae210cabe4303a61d340028810348f8228c533a5c18f6b4bec3801c56
font_02_sfnt_off00011c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C05 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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