Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0fb8437ce45bce4…

MALICIOUS

PDF

102.4 KB Created: 2021-03-25 11:58:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee2675266016d2c4501f29be0262d8d9 SHA-1: 8f352ee0b24895176891f64beb03b33fff09cafe SHA-256: f0fb8437ce45bce41be68ac2e50c26018cc3b01cd7f471795258b5ef2335ce54
96 Risk Score

Malware Insights

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

The PDF document contains a lure related to dental costs, directing the user to a suspicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of an external URI and the overall detection profile suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://fokemale.ru/aws?utm_term=how+much+does+a+new+crown+cost+on+the+nhs
    • https://cdn.sqhk.co/dizoketa/igjsAge/zuzixemasazosusokaxuron.pdf
    • http://shopmzm.site/69470345586l58lk.pdf
    • https://cdn.sqhk.co/kiwametin/Fuii3jg/gotozoliwukosamonukokuno.pdf
    • https://cdn.sqhk.co/kabevapixox/Wfnijgc/75005326587.pdf
    • https://static.s123-cdn-static.com/uploads/4457332/normal_5ff97e9a973f7.pdf
    • https://cdn.sqhk.co/busanurutar/RHiekIf/19442390838.pdf
    • http://gidubanijokov.22web.org/6539433766.pdf
    • http://bcpzonasegura10beta-viabcp.com/learn_russian_online_freeowmya.pdf
    • https://static.s123-cdn-static.com/uploads/4420248/normal_5ff408085a3f8.pdf
    • http://rusakova.space/cs6003_ad_hoc_and_sensor_networks_unit_1_pptghkwh.pdf
    • https://cdn.sqhk.co/fotutubujuf/jdhdjaf/merax_boxing_tower_combo.pdf
    • https://cdn.sqhk.co/kusonemap/jhgHhcz/81566551243.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/rewepalazamiso/beyonce_lemonade_formation_lyrics.pdf
    • https://s3.amazonaws.com/lomuper/acca_f9_past_papers_with_answers.pdf
    • http://gurevetafajes.epizy.com/clostridium_difficile_spore_formation.pdf
    • https://s3.amazonaws.com/wukara/top_thrilling_games_for_android.pdf
    • http://jatufivo.rf.gd/workbench_design_book.pdf
    • http://rukawinasi.rf.gd/1133_questions_an_interventional_cardiology_board_review_free_download.pdf
    • http://dupunijasazo.epizy.com/bimofipurilitifumudev.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001439a.bin
c83cb82fe80b7152df6178513745e5f4256c02c32cd58919428386e14de56f19
pdf-font-stream PDF embedded font (sfnt) at offset 0x1439A 5036 bytes
font_01_sfnt_off00015490.bin
a09f3523284d2cad49d80481d3e82ac8f6f6d8844ca64cf27b3e6c055560860d
pdf-font-stream PDF embedded font (sfnt) at offset 0x15490 12256 bytes
font_02_sfnt_off00017e01.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x17E01 4324 bytes