Malicious PDF — malware analysis report

Static analysis result for SHA-256 87da4462d8d3b64d…

MALICIOUS

PDF

65.8 KB Created: 2021-03-03 07:48:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4bf51d3231d91c6d50686604642bde0c SHA-1: 6ebf7d704afb6fb273c56abe72979aacd08ac8f3 SHA-256: 87da4462d8d3b64d585a87245e2ce61d9ecbd08f393b01edccfad2cfff672e9a
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/wix?keyword=ap+literary+terms+crossword+puzzle+answers PDF link annotation
    • https://cdn.sqhk.co/xafeperale/cFojjCE/time_zone_surfers_paradise.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/stanley_2m_series_spotlight_not_working.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/the_highwaymen_movie_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/a7ggN2s/vifikugej.pdfIn PDF document text
    • https://renudufodajofi.weebly.com/uploads/1/3/4/8/134884992/rubafulilevepizulik.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/fatazirifelutagek.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/97268103978.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/ibB07gf/fajazekutivusif.pdfIn PDF document text
    • http://kifevoliga.iblogger.org/soundbot_sb360_bluetooth_4.0_car_kit.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/runaw.pdfIn PDF document text
    • https://cdn.sqhk.co/ladetozuxi/YOdAicE/bird_life_cycle_video.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/jjmjcgj/pic_this_word_picture_search.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/bare_necessities_ukulele_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/how_to_read_ecg_quickly.pdfIn PDF document text
    • http://bekabugi.epizy.com/coin_values_guide_international.pdfIn PDF document text
    • http://punugituk.epizy.com/dakakazuvitojanupapuzav.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_off0000c5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FE 5452 bytes
SHA-256: 0ed4dc695229032bae9caf32569c9d1cb61455789581659b6e458f89ce9fbeaa
font_01_sfnt_off0000d88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88F 9844 bytes
SHA-256: 8c9025bfc6689e44ae003c141b6317f532dca714f297a5e55935c9af75856c50