Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe4750af531332c…

MALICIOUS

PDF

70.1 KB Created: 2021-03-14 13:19:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a88645d6877d427dbb7bad82604a6672 SHA-1: bfeaf935353d701a13130a3d85d624bc249a4a3f SHA-256: bfe4750af531332c64d4686c99500f236eac7493920184a7e28e852ba6da9d27
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting and link farms, suggesting an attempt to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the nature of these links as a tactic for distributing malware or conducting phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/award?keyword=hambriento+nach+libro+pdf PDF link annotation
    • http://siteznakomstv69.space/cant_connect_gopro_hero_3_to_app761sb.pdfIn PDF document text
    • http://blacklaser.ru/organizacion_empresarial_definiciono2ej4.pdfIn PDF document text
    • http://antileqphh.site/corporate_manslaughter_sentencing_guidelines_2016g17oh.pdfIn PDF document text
    • http://fanogizakelime.iblogger.org/produccion_agropecuaria_definicion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460232/normal_5fd7dc49d8dfa.pdfIn PDF document text
    • http://tobubolixej.iblogger.org/contrarian_investment_strategy.pdfIn PDF document text
    • http://pitushok.fun/nanetimiwepule2rth.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380674/normal_60038b7b46e6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370056/normal_5feeb1a22bee3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487906/normal_600baa66c42f7.pdfIn PDF document text
    • http://thecet.xyz/how_long_would_it_take_to_count_to_one_hundred_milliona6imw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451205/normal_604b92c358aba.pdfIn PDF document text
    • http://durasazi.iblogger.org/what_is_the_5_minute_journal.pdfIn PDF document text
    • http://sepibuzare.22web.org/walter_riso_quotes_english.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382201/normal_5fd0968dd974e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://silimevi.epizy.com/88212499487.pdfIn PDF document text
    • http://mexesumofiruvaf.rf.gd/weather_report_in_hyderabad_pakistan.pdfIn PDF document text
    • http://jigosip.epizy.com/65663138655.pdfIn PDF document text
    • http://difesasud.epizy.com/waxixovaserij.pdfIn PDF document text
    • http://burufag.epizy.com/cyberpunk_2077_reddit.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_off0000d2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B9 5320 bytes
SHA-256: c0beb0dc0b7e8f0c4096c5f2341cf7aea9c496ba48876de24467527f4b1787ed
font_01_sfnt_off0000e49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49C 11344 bytes
SHA-256: e456b298a72ee78fc2bbae3e8c595795396928341e498cd39bd27eeb5fca30a7

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