Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b671f82e710a050…

MALICIOUS

PDF

80.7 KB Created: 2021-03-18 08:41:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 42bdd61daa519071166b63fcdc54d639 SHA-1: 363bd5caa72cade236e973167470e9ec18d4f3af SHA-256: 1b671f82e710a050401aebef750242e062faaccc966d495bbc3bc300a510f646
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a primary lure related to 'Facebook ads tutorial pdf 2020', suggesting a phishing or social engineering attack. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the malicious nature by indicating the use of disposable hosting for link farms. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/award?keyword=facebook+ads+tutorial+pdf+2020 PDF link annotation
    • http://davegopodowog.iblogger.org/compare_and_contrast_the_structure_of_a_dna_nucleotide_and_an_rna_nucleotide.pdfIn PDF document text
    • http://basagutidabe.sportsontheweb.net/the_ascents_of_james.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371265/normal_601a0a2e5598a.pdfIn PDF document text
    • http://circulshtangcalip.website/what_temperature_is_ideal_on_a_brinkmann_smokerq58fe.pdfIn PDF document text
    • http://vodoroding.info/407096884689oin6.pdfIn PDF document text
    • http://kijekidajefi.getenjoyment.net/54251301796.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484807/normal_5ffb075e94675.pdfIn PDF document text
    • https://xabejopoturidu.weebly.com/uploads/1/3/4/3/134352457/lepusip_tinolusil_telisul.pdfIn PDF document text
    • http://ukrdomonis.xyz/the_redemption_movie_downloadgteq1.pdfIn PDF document text
    • http://wanuvutukuv.iblogger.org/fight_club_movie_720p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387826/normal_60169653c65e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475989/normal_60298ce17dd5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420911/normal_604934c759fa2.pdfIn PDF document text
    • http://tujubafi.getenjoyment.net/constructing_perpendicular_lines_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424347/normal_604eaea22514d.pdfIn PDF document text
    • https://wavenugila.weebly.com/uploads/1/3/4/8/134852162/1219073.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370740/normal_5fecd5be8134f.pdfIn PDF document text
    • http://trastenmyqort.online/weber_smokey_mountain_14.5-inch_smoker_cookere67kc.pdfIn PDF document text
    • http://elinekici.online/todabugowibul4ybf0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dipagepe.atwebpages.com/91829940637.pdfIn PDF document text
    • http://wujasulo.epizy.com/endless_legend_vaulters_research_guide.pdfIn PDF document text
    • http://pijosufun.myartsonline.com/alfredo_bosi_ceu_inferno.pdfIn PDF document text
    • http://tolitaxolumupu.rf.gd/peneranipuvunura.pdfIn PDF document text
    • http://zixoridepub.rf.gd/sifarutakegafukina.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_off0000fcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAB 5584 bytes
SHA-256: d60b894a71aacbff7479a5ed05d2f71d72d128268a7d311545e22500a9384bf4
font_01_sfnt_off00010fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB5 11056 bytes
SHA-256: 8eb24492a94e41aee96e680e5883f6caf60c67050c04ceeb69065e31bfa75882

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