Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4975f4d7f3a283b…

MALICIOUS

PDF

72.9 KB Created: 2021-03-09 00:14:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a2c067699a36ea33cd81e029d21d592c SHA-1: 992b6ccf49913a710b4f4870b87d0a1546760e10 SHA-256: f4975f4d7f3a283b05025e6ac37608a4f321aca3beaf04c457ee30acbcdda161
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to distribute malicious content or phish users. ClamAV and ML classifiers strongly indicate maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of numerous external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/award?keyword=possessive+adjective+spanish+pdf PDF link annotation
    • http://autoport76.online/yellow_belt_lean_six_sigma3uyu4.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/eje4lhf/karikuruwir.pdfIn PDF document text
    • https://cdn.sqhk.co/fetuxudo/RzbgTha/material_safety_data_sheet_clorox_urine_remover.pdfIn PDF document text
    • http://nijaxubazaziw.mypressonline.com/sixumuvanobikovuza.pdfIn PDF document text
    • https://kosipomorogimel.weebly.com/uploads/1/3/4/3/134307263/638d1eb82d3.pdfIn PDF document text
    • http://clubstore.pro/88871424997e2wkg.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/lfxhcmQ/97391961028.pdfIn PDF document text
    • https://bolojowugupi.weebly.com/uploads/1/3/4/8/134886087/648768.pdfIn PDF document text
    • https://cdn.sqhk.co/sirojenu/gjjgic7/54409006808.pdfIn PDF document text
    • http://findattime.com/3370963686y1dvq.pdfIn PDF document text
    • https://cdn.sqhk.co/jukusenefow/pyNhiib/n7player_music_player_apk_download.pdfIn PDF document text
    • http://menugefo.iblogger.org/64032735945.pdfIn PDF document text
    • https://wazelekur.weebly.com/uploads/1/3/4/3/134322050/fuleref-zotewumakor-lobulob-vowigukakimesof.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/2456ba136ff.pdfIn PDF document text
    • http://xivazokib.medianewsonline.com/nourishing_traditions_pregnancy_diet.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/xebuxuwitu.pdfIn PDF document text
    • https://vilujelirajoki.weebly.com/uploads/1/3/4/3/134378771/dobutebibukazo_fimuxiposuwesu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lozepis.epizy.com/english_writing_worksheet_for_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/endnote_citation_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/12739747946.pdfIn PDF document text
    • http://saperemobopiga.epizy.com/kinyarwanda_swahili_dictionary.pdfIn PDF document text
    • http://tetiduba.rf.gd/16417857229.pdfIn PDF document text
    • http://pisonepegosa.myartsonline.com/bebegogu.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_off0000dfd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD2 5252 bytes
SHA-256: 069b2f23fb009fe70d1b4fe8d2f00ca5ac32c9cdd1dd87df00958a7d6b7df27d
font_01_sfnt_off0000f1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CB 10728 bytes
SHA-256: 01a2d1a4227d93f37c91708d4b4c6d0fb7fc09cc73d94e2144ef9b3ec0fa5358

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