Malicious PDF — malware analysis report

Static analysis result for SHA-256 41aed543a479f56d…

MALICIOUS

PDF

80.0 KB Created: 2021-04-04 13:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 97c58116ff15e03757aaf37f8464b437 SHA-1: ac2e4d749a90ad79d4feed83e9473ed8d4629be7 SHA-256: 41aed543a479f56d2fb88c5c96e310612fc966da3d202ca568c9ea30bb7a7bb6
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with a prominent one pointing to 'jacksth.ru', suggesting a phishing or malware distribution lure. The presence of multiple disposable domains and link farms further supports a malicious campaign aimed at redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jacksth.ru/award?keyword=camera+scanner+to+pdf+premium PDF link annotation
    • https://cdn.sqhk.co/suwajipufo/aibXicb/city_rider_e_scooter_erfahrungen.pdfIn PDF document text
    • http://xupenirulavep.iblogger.org/19401980022.pdfIn PDF document text
    • http://ecoservice-vlad.ru/pojimemigobapedumoradqadu.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/vajepodiroxerowonqp6.pdfIn PDF document text
    • http://cosmicgig.com/oracle_sql_regex_substring_examplesz4my.pdfIn PDF document text
    • https://cdn.sqhk.co/dolafita/fVShehi/86201599130.pdfIn PDF document text
    • https://cdn.sqhk.co/dazibewibu/idiiAij/greater_trochanteric_bursitis_exercises.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/hfjhCdY/market_garden_1944_map.pdfIn PDF document text
    • http://fbdirect.site/why_is_my_samsung_printer_not_printingovfxl.pdfIn PDF document text
    • http://shoplus.info/cva_wolf_209_for_salepvjgp.pdfIn PDF document text
    • https://zilakakazaxo.weebly.com/uploads/1/3/4/4/134442972/wejaf_zozof_dimateraruxat.pdfIn PDF document text
    • http://smartcreditus.info/bose_acoustic_wave_music_system_ii_service_manualbb3ju.pdfIn PDF document text
    • https://suxeredevi.weebly.com/uploads/1/3/4/0/134000194/pawajurapu_bifatazaralej_wefitibafojelas.pdfIn PDF document text
    • http://file-id.ru/52434567956d7100.pdfIn PDF document text
    • https://cdn.sqhk.co/sovajepuxe/hilheHL/suppressor_cover_review.pdfIn PDF document text
    • https://zunesevofulopu.weebly.com/uploads/1/3/4/3/134385883/9ac3af4d.pdfIn PDF document text
    • http://adyga.site/admob_native_ads_in_recyclerview_androidmjfda.pdfIn PDF document text
    • https://boxavukexuzar.weebly.com/uploads/1/3/0/7/130775797/9465509.pdfIn PDF document text
    • https://moluzepin.weebly.com/uploads/1/3/1/8/131856103/1adc1bfc.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://xoviketi.epizy.com/65910421141.pdfIn PDF document text
    • http://mesujexu.rf.gd/2517815993.pdfIn PDF document text
    • http://baxojusapu.epizy.com/xavidajimujurodimod.pdfIn PDF document text
    • http://zujuguj.epizy.com/febujesaso.pdfIn PDF document text
    • http://matogojetize.rf.gd/dosowul.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_off0000ebe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE2 5172 bytes
SHA-256: 77f1412c0f17b4ff6b64a1d7f7e5b5ba02e906b398afe37b1cdfbfa6a84e42a3
font_01_sfnt_off0000fd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5E 11452 bytes
SHA-256: 1d97e9b343f731257f5324f5a1baf3b9500cf74e93bd6ba3190203e6071f03ba
font_02_sfnt_off00012417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12417 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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