Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6752f8f084486d3…

MALICIOUS

PDF

75.5 KB Created: 2021-02-08 22:31:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e35bb71d804e727b44992c33277dc30d SHA-1: f905dfd7306e62663a10b3491b195f566a12f628 SHA-256: a6752f8f084486d3f90d278e0fca8d1d2a95a51f0d5ca27ea4a862a98db56a30
126 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, many of which point to disposable hosting and are likely used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on potentially malicious domains. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • 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://bologen.ru/aws?utm_term=artemia+adalah+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370294/normal_601cb480ebdac.pdfIn PDF document text
    • https://cdn.sqhk.co/bezorufuv/jejfhjc/53856415740.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413109/normal_60083b0b895f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460709/normal_5fdb906b9ea69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404502/normal_5fdc155ca8725.pdfIn PDF document text
    • http://vitrinachel.ru/wugakoqk89b.pdfIn PDF document text
    • http://autoupgrade.website/29175493459y5wod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426960/normal_601f9de098987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475872/normal_6021667a691b8.pdfIn PDF document text
    • http://coolvdomaion.online/ropudisezameguwofuh4zo4.pdfIn PDF document text
    • http://merishwheelrecords.com/queen_size_platform_bed_frame_canadazo2zs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417527/normal_5fc597c41725a.pdfIn PDF document text
    • http://fafaviga.iblogger.org/wuval.pdfIn PDF document text
    • http://mifvideo.space/cet_result_2020_downloadtlexq.pdfIn PDF document text
    • https://cdn.sqhk.co/tajixixejafi/DhaehjO/sunset_views_austin.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/pubipataxawolerw9ksq.pdfIn PDF document text
    • https://cdn.sqhk.co/budijapa/ihcmygf/twisted_tea_flavors_in_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/aifij8W/89929125188.pdfIn PDF document text
    • http://topfrag.rip/mubadaz38byo.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
    • http://suwuxuk.epizy.com/27060504866.pdfIn PDF document text
    • http://ratesedefavure.epizy.com/ponapefuge.pdfIn PDF document text
    • http://wadokeg.epizy.com/bakteri_enterobacter_sp.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_off0000df26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF26 4664 bytes
SHA-256: 8a22f35b6a18e66378b3d0348bcecd4b732622bbc1381556deec5f9fa3cc8a95
font_01_sfnt_off0000eeed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEED 10392 bytes
SHA-256: 6da779d443724e2a0902b8c715773b223c32541446ee7fec7f881b9431f96da7
font_02_sfnt_off00011223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11223 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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