Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b63128d93aa074…

MALICIOUS

PDF

80.0 KB Created: 2021-02-17 09:07:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dee0f8af43c2a917a6b626246354e924 SHA-1: 2d077755973d0e66c49c28650743adaec94ff909 SHA-256: d0b63128d93aa074275a98d8ab0415027b7019a50265e7fe28d295567809a330
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 0.9998

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/strik?utm_term=andromeda+strain+movie+poster PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494657/normal_5fefcee039887.pdfIn PDF document text
    • http://my-favshoph.online/frases_satanicas_en_latinswe0n.pdfIn PDF document text
    • http://instofficial.online/10954255523g5zr4.pdfIn PDF document text
    • http://bu-markett.com/er_physician_assistant_salary_by_statet9yfg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445880/normal_60117dd24e3f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385421/normal_6011ec11368c0.pdfIn PDF document text
    • https://cdn.sqhk.co/bupedamarib/bhhjjp4/8231152707.pdfIn PDF document text
    • http://rupebakonodeja.iblogger.org/languidecer_significado_bblico.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://leliruwe.epizy.com/today_s_weather_report_in_my_location.pdfIn PDF document text
    • http://sivokag.epizy.com/utorrent_android_games.pdfIn PDF document text
    • http://mesovinofezesat.epizy.com/all_star_smash_mouth_piano_sheet_music.pdfIn PDF document text
    • http://potosalusuk.rf.gd/club_car_carryall_6_parts_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/xedupalakaw.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/cbse_net_exam_form_last_date.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/mindfulness_guided_meditation_app.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/chamberlain_garage_door_opener_parts_manual.pdfIn PDF document text
    • http://fidosofesus.rf.gd/xivawudesage.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_off0000ef7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7B 4908 bytes
SHA-256: e1c053d20ca329c9bdedfd2700b8f334ebf1e23c80213280b31da41f8fb8f455
font_01_sfnt_off0001000a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000A 10852 bytes
SHA-256: 19d504ac71568c10208015d3fe8f26d7b36d5fd08af0b4e3c1f2d736db38b8ab
font_02_sfnt_off00012502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12502 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2