Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88bc14bce6cdb67…

MALICIOUS

PDF

74.9 KB Created: 2021-03-13 22:56:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 87630ddccfbe21022a1f0afc76e88d6a SHA-1: a05480696cd008864a3ee71250b674abc2d4b7c1 SHA-256: e88bc14bce6cdb672a3f6ca752c562bfa55bad5938c400ff9d540a85ea08a0d0
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8641

Heuristics 4

  • 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
  • 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://jumiwimov.ru/award?keyword=workplace+stress+definition+pdf PDF link annotation
    • https://cdn.sqhk.co/luwibajik/jjahjhg/rorawigupodofow.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/administrao_pblica_resumo.pdfIn PDF document text
    • http://jenewazajasazu.getenjoyment.net/tudo_sobre_cancer_de_colo_de_utero.pdfIn PDF document text
    • http://diwizog.22web.org/polaris_360_hose_coupling.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/wuwolitepara.pdfIn PDF document text
    • https://cdn.sqhk.co/vovoritufi/heibhid/cops_n_robbers_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/wavudasawete/jggj1hN/latest_movies_websites_bollywood.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/570599b3-c825-4cf6-8091-e0c723e90eb7/what_is_the_shortcut_key_for_screenshot_on_windows_10.pdfIn PDF document text
    • http://xukobogovug.rf.gd/gizukigewumofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cdd3184-e65c-4a65-9aad-a24dd439ee5c/kenmore_elite_washer_cleaning.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/jurnal_capital_adequacy_ratio.pdfIn PDF document text
    • http://xolekazejufu.rf.gd/biotecnologia_farmaceutica_livro.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/information_about_neet_exam_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/platform_sneakers_outfits_tumblr.pdfIn PDF document text
    • http://welididoseburiv.epizy.com/human_relations_theory_definition.pdfIn PDF document text
    • http://befojarariwowab.epizy.com/bruce_lee_songs_sen_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/popapolimi.pdfIn PDF document text
    • http://vedidutumi.rf.gd/52818058585.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/bike_race_apk_hack.pdfIn PDF document text
    • http://kenesowozowojaw.myartsonline.com/kinuwezanediper.pdfIn PDF document text
    • http://wirirarosutuki.epizy.com/60989430188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfacb59c-9c5b-49d4-bd79-9d1d01b14e41/92559618187.pdfIn PDF document text
    • http://rasukadixekurij.rf.gd/danny_s_song_violin_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b19824a6-0211-42a9-9174-0c30f9c8285b/82061996986.pdfIn PDF document text
    • http://dufofukitali.rf.gd/nunidifomesigudunekukiwug.pdfIn 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_off0000f25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25E 5012 bytes
SHA-256: 8d463bfc64346a5adf94f76cb77750182d6551ee3bcd7e3eb2aa47cb38b1d446
font_01_sfnt_off00010385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10385 10956 bytes
SHA-256: 9122a47575c9a71ce6ac5adc89a5311b13b4f9d1e225089dadf9fa8ae2aadaf7

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