Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc1b2c47172ca2b6…

MALICIOUS

PDF

71.9 KB Created: 2021-02-20 08:37:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7d9ef813a0eafafb7ff7ff24d3012f6b SHA-1: 0dde8701b225415601003ebae9430a0f1b7c9f1e SHA-256: bc1b2c47172ca2b6663d4d1b19d9ededb05957fe37d48888de1e4b25ec0db3ef
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=brookline+high+school+calendar PDF link annotation
    • https://cdn.sqhk.co/gisepavuv/o1YShe5/rechargeable_aa_batteries_review_australia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366993/normal_5ff3a9310c558.pdfIn PDF document text
    • http://xigotazuwal.iblogger.org/rental_agreement_template_residential.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/d6IGrif/black_friday_deals_best_buy_phones.pdfIn PDF document text
    • https://cdn.sqhk.co/ramazunor/XwgeUYy/usa_online_shopping_list.pdfIn PDF document text
    • https://cdn.sqhk.co/subogutaze/jcIhadu/xabezebude.pdfIn PDF document text
    • https://cdn.sqhk.co/bezakebijuk/doZAhbz/zegubogoxifoka.pdfIn PDF document text
    • https://cdn.sqhk.co/bufudoraxala/8C4Xij3/guess_the_emoji_movies_level_6.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://nugafafekovad.epizy.com/bigger_faster_stronger_logbook.pdfIn PDF document text
    • http://vomusisoz.epizy.com/zonaponufelitanomim.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/603800603.pdfIn PDF document text
    • http://redebalumu.rf.gd/18726987791.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/dragon_age_inquisition_strategy_guide_book.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/lodekegofusekaru.pdfIn PDF document text
    • http://rogidisili.rf.gd/40656916043.pdfIn PDF document text
    • http://rawozovikoruros.rf.gd/spanish_present_progressive_tense_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/ribupokenurodurukovunakug.pdfIn PDF document text
    • http://nipesuvaz.epizy.com/17107878950.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_off0000cfed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFED 5024 bytes
SHA-256: 916ebfd307f66437c4bfb5241331b0cedb84642de786e73a3a1e98113040a1d2
font_01_sfnt_off0000e0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E2 10304 bytes
SHA-256: fec7425c4bcf187ed9af3e8faac6472907efd7d1e9fbe54566e61852f6235fec
font_02_sfnt_off00010439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10439 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333