Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c09114c448fe44…

MALICIOUS

PDF

77.9 KB Created: 2021-04-19 03:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0afa43694f1fc7ae98afe643bff91cbf SHA-1: eeed2cfd6d3a73903a672036161598e5b3c011f0 SHA-256: 86c09114c448fe44c27c0ae3b1a0dc95d90df620114665486266ac13f8f22557
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://fokemale.ru/strik?utm_term=davinci+resolve+edit+page+tutorial PDF link annotation
    • https://cdn.sqhk.co/vetejevibas/Bhhjdgi/42417434939.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462350/normal_6027f878e0d78.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/zuxazuzazovidugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393759/normal_606550af1bb9a.pdfIn PDF document text
    • http://fakexexu.sportsontheweb.net/97301405101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446490/normal_6059af1348eb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389127/normal_6011c79915d79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391335/normal_5ffca2f179a87.pdfIn PDF document text
    • https://cdn.sqhk.co/norejasiwiza/emibmaW/63562234039.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503617/normal_5fc8dcc31ed58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404310/normal_5ff5e84e95315.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/is_walmart_still_on_covid_hours.pdfIn PDF document text
    • https://tirilume.weebly.com/uploads/1/3/4/8/134886795/5962395.pdfIn PDF document text
    • https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/xagenikonez.pdfIn PDF document text
    • https://zunukewonodej.weebly.com/uploads/1/3/1/4/131453615/kinagowoxuxuja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490738/normal_6062554c25370.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/jfgdNgj/89074484225.pdfIn PDF document text
    • http://fezomoworiva.22web.org/ad_blocking_for_chrome_android.pdfIn PDF document text
    • http://lezofifividex.scienceontheweb.net/90870717605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371013/normal_600ef4bce5da5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421366/normal_602db0b0e7f51.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/fMUXjje/bemivojomolikifumujozab.pdfIn PDF document text
    • http://bufosizodibe.iblogger.org/99702110451.pdfIn PDF document text
    • https://vorexumezekadan.weebly.com/uploads/1/3/0/9/130969740/lefovexikibo.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/frxmyjj/hide_and_seek_movie_2018_cast.pdfIn PDF document text
    • https://navitadewota.weebly.com/uploads/1/3/4/0/134017874/d12b2a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tepimajasajuk.epizy.com/76210036845.pdfIn PDF document text
    • http://gozudil.onlinewebshop.net/the_things_they_carried_test_answer_key.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_off0000f131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF131 5300 bytes
SHA-256: 1471306c656c132c548e36181efe2f727e8271c670fc92cbb91fcb19082df98d
font_01_sfnt_off00010350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10350 11164 bytes
SHA-256: 865b5297c51d241804eb2fa986d4080dbc30e70b470c161789f88defe5470d18