Malicious PDF — malware analysis report

Static analysis result for SHA-256 9836202f183919b6…

MALICIOUS

PDF

87.2 KB Created: 2021-03-08 06:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f83682b994cddba528eb82536bd46ff3 SHA-1: b16ff574e94d27cf7a3102bf992f771f5078931f SHA-256: 9836202f183919b65a46270ecae47cac6341788b74cac3581a8fc648fa9cb769
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 0.9951

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/wix?keyword=crown+royal+rebate+form+2020 PDF link annotation
    • https://cdn.sqhk.co/nokowifupe/gcgcqjf/pojuwuveribosexixobig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421201/normal_60199f6663109.pdfIn PDF document text
    • https://fabuxitewuf.weebly.com/uploads/1/3/4/3/134349615/pezafudedifunege.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476285/normal_602891d98e879.pdfIn PDF document text
    • https://tidekomix.weebly.com/uploads/1/3/4/4/134441433/5842889.pdfIn PDF document text
    • http://vitonidero.medianewsonline.com/best_vhs_to_dvd_converter_2019.pdfIn PDF document text
    • http://fuwijumazawad.mywebcommunity.org/60333131315.pdfIn PDF document text
    • https://rumikupim.weebly.com/uploads/1/3/5/3/135310872/f965c6dcf0fea.pdfIn PDF document text
    • https://nikibowo.weebly.com/uploads/1/3/4/3/134354591/kojibozu_nulozidamag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379736/normal_6011b64d017ea.pdfIn PDF document text
    • https://sokuvefababadax.weebly.com/uploads/1/3/1/8/131856373/kutusop.pdfIn PDF document text
    • https://vulopinuvi.weebly.com/uploads/1/3/1/1/131164419/e13bee97e89742.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/kosefefuruduligofi.pdfIn PDF document text
    • http://mitisavad.getenjoyment.net/aws_cloud_computing_certification_course.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/hBgf0ig/99775664088.pdfIn PDF document text
    • http://rabiwitijif.medianewsonline.com/40619876654.pdfIn PDF document text
    • http://suzofovolavuk.scienceontheweb.net/brother_pt-d200_label_maker_instructions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388165/normal_60144ca559584.pdfIn PDF document text
    • https://cdn.sqhk.co/pevedapev/6eibWpR/guvimudeda.pdfIn PDF document text
    • https://jomezafivawig.weebly.com/uploads/1/3/1/8/131856232/2867511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406456/normal_602f358e08c4d.pdfIn PDF document text
    • https://cdn.sqhk.co/zirizowesaw/162jhha/wavuzipetizowaxas.pdfIn PDF document text
    • https://jukikekiku.weebly.com/uploads/1/3/1/4/131453151/7593630.pdfIn PDF document text
    • https://cdn.sqhk.co/wewotiwalote/igjbzta/66252554526.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://vigexosav.myartsonline.com/sadodulabodazusozo.pdfIn PDF document text
    • http://memamawu.onlinewebshop.net/que_viva_el_amor_in_english.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_off00010c1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1A 5104 bytes
SHA-256: 32e10b4fbf79e398b5c6e60d51b9a54b8b318c046b03a66ce555a546288cfc78
font_01_sfnt_off00011d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D77 10304 bytes
SHA-256: 161456c2e00ff64bf8d18d668f0c13800e6f2827b9255f5c1e649489b24338c4
font_02_sfnt_off00014091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14091 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230