Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f4f52e3413d4869…

MALICIOUS

PDF

74.1 KB Created: 2021-02-12 22:11:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: da42bc0f7e0fb54da0289ca516a53fca SHA-1: 1dbe094c145052907dc4e433ab4ae4c8e9d8b8e3 SHA-256: 7f4f52e3413d48699703c2f656fd50fac50817b7bf1c14c2e2dbc1fdbcc3ba50
136 Risk Score

Malware Insights

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

The PDF contains multiple suspicious and external URIs, with one specifically noted as an invisible link to a suspicious domain, indicating a phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a phishing payload or exploit. No scripts were extracted, but the presence of multiple malicious URLs points to a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://jottigo.ru/123?utm_term=correct+words+per+minute+chart PDF link annotation
    • http://sberpodarok2020.online/98079436266k73st.pdfIn PDF document text
    • http://rukunikuxajosog.22web.org/billionaires_club_video.pdfIn PDF document text
    • http://taher-tcac.com/90948600161g6ogn.pdfIn PDF document text
    • https://cdn.sqhk.co/lusimalifa/dje7ib8/be_my_little_baby_bumblebee_chords.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/OjbngfS/highway_to_heaven_cast_season_1_episode_5.pdfIn PDF document text
    • http://winoorama.website/dig_emulator_frontend_apkrf94p.pdfIn PDF document text
    • http://lnstagram-support.live/helix_ball_game_unblocked48yyp.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/QZ4W0ja/asteroids_outpost_gameplay.pdfIn PDF document text
    • http://bigmagazin.xyz/ravubasafilevunini77k71.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/ijzXggw/75380464951.pdfIn PDF document text
    • http://lnstagramsecurity.net/childish_gambino_redbone_download_mp3gkgep.pdfIn PDF document text
    • http://zemegulobeka.iblogger.org/11122183784.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://padubarejibuso.rf.gd/feeling_words_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/aneurisma_fusiforme_da_aorta_abdominal_infrarenal.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/antiarrhythmic_drug_classification.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/minima_moralia_adorno_espaol.pdfIn PDF document text
    • http://zapuwoz.epizy.com/channa_mereya_full_movie_punjabi.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/hello_brother_bollywood_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/33035514940.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_off0000e42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42E 5280 bytes
SHA-256: 4b242bd6cea978735e9eafb2850b3e1300eb154214f0c62f7680280d5c35cf90
font_01_sfnt_off0000f606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF606 10816 bytes
SHA-256: 71e62fcaa92c8ed654c91fa25b82fa6d09824459578a82877ed5306ecac5b117

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