Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde42f4f65b18c34…

MALICIOUS

PDF

68.3 KB Created: 2021-03-28 14:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5abc462048838029f91739cf93cef59d SHA-1: c1100e8fc60d928ffe27d0649e5c62eebcbbedc3 SHA-256: cde42f4f65b18c349060c15ea8f5da74cb923eabac3636ccbc62718961e653a1
184 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, many of which are identified as redirectors to malicious infrastructure. The document body, though heavily obfuscated, appears to be a lure related to search terms, aiming to trick users into clicking malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=literary+terms+word+search+answers In PDF document text
    • http://numulul.mygamesonline.org/how_to_study_for_ap_human_geography_test.pdfIn PDF document text
    • http://fevevafo.medianewsonline.com/nunca_foi_sorte_adriana_sant_anna_download.pdfIn PDF document text
    • http://konsalting.info/188697085244306a.pdfIn PDF document text
    • http://patavitukazinaz.iblogger.org/javafx._platform_is_not_defined.pdfIn PDF document text
    • http://zoomita.fun/quantum_cat_by_sarvesh_kumar_vermabd0a8.pdfIn PDF document text
    • http://ufenmac.com/4803961764nei3v.pdfIn PDF document text
    • http://ketadiets.site/4680410433148tet.pdfIn PDF document text
    • http://reduslim-siteofficial.site/what_station_plays_old_country_musicxq0jn.pdfIn PDF document text
    • http://vilopeg.xyz/2492818756583wk.pdfIn PDF document text
    • http://lazebusotidedof.22web.org/jonupijotamawuw.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/indesign_export_booklet_printing.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/biochemical_effects_of_lead.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/i_am_malala_book_in_urdu.pdfIn PDF document text
    • http://timinome.getenjoyment.net/12373967133.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://toluvubub.mygamesonline.org/rigul.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/zusevamasor/who_played_voldemort_in_harry_potter_and_the_half_blood_prince.pdfIn PDF document text
    • http://binusogug.rf.gd/absceso_cerebral_amebiano.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/40195745101.pdfIn PDF document text
    • http://jujiruwer.rf.gd/old_ncert_ancient_history_rs_sharma.pdfIn PDF document text
    • http://benogelepawes.rf.gd/mewejukokukuzigosidaxiv.pdfIn PDF document text
    • http://jafixomedimun.onlinewebshop.net/90029389309.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE08 5280 bytes
SHA-256: 7fd70b126c4e9fdee9137741a678b464696abb33f75a8e030792e1ed72b46dc7
font_01_sfnt_off0000dfe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE5 10764 bytes
SHA-256: cd21506df915e7633333da76e7f2e94d27cb16590e27506d6d03e2828e3acea9

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