Malicious PDF — malware analysis report

Static analysis result for SHA-256 43a47515b7df0564…

MALICIOUS

PDF

93.7 KB Created: 2021-03-21 10:21:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: a7f67feb42a8af5baba174fb7ebac93f SHA-1: 978b03e65bbdad5df9eda1b1fdf968c31dbabe06 SHA-256: 43a47515b7df056496f9b8bd89156c142c381264afa2cdbe0eace41f3ea8f917
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'bologen.ru' which is likely part of a phishing campaign. The document body, though heavily obfuscated, suggests a lure related to a 'bible reading plan pdf'. No scripts were extracted, but the PDF structure and embedded URIs indicate a phishing attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://bologen.ru/strik?utm_term=40+day+bible+reading+plan+pdf PDF link annotation
    • https://cdn.sqhk.co/povewepalu/giijhjr/valegexomavatijarela.pdfIn PDF document text
    • http://a-trvl.ru/botagavopezetelilsf7fw.pdfIn PDF document text
    • https://cdn.sqhk.co/jafakitiw/jbihoif/horace_silver_peace_lead_sheet.pdfIn PDF document text
    • http://gtmedis.com/24722433829d6gt2.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/7iihfoq/binirerawupuxojobusuvediw.pdfIn PDF document text
    • http://dabuxupufudina.22web.org/6681359464.pdfIn PDF document text
    • http://zipaxepuda.22web.org/azodyl_vetoquinol.pdfIn PDF document text
    • http://dubunidenore.iblogger.org/76927292953.pdfIn PDF document text
    • https://cdn.sqhk.co/sazalevimit/jaiajaK/gidevevakunamugami.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
    • https://uploads.strikinglycdn.com/files/e382f919-f79d-476f-bd3d-f8128d64609a/types_of_textured_ceilings_pictures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a3ebfbd-1e2d-4d91-9cb5-20320ac884b7/sprint_promo_codes_november_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8654904a-bfb7-496d-9e8f-923fcb548979/28868661622.pdfIn PDF document text
    • http://gawexerexi.rf.gd/48444135860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0e69c98-3688-4ba7-b6c0-9b4428c6f636/41253282087.pdfIn PDF document text
    • http://sabarudijavu.epizy.com/31231377966.pdfIn PDF document text
    • http://vunefukovamin.rf.gd/geometry_and_measurement_worksheets_grade_8.pdfIn PDF document text
    • http://fipenalexaxa.epizy.com/adobe_acrobat_dc_ocr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fbcd4eb-8be1-4c01-9e73-87cc786726d5/lenovo_y500_audio_drivers_for_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4436fc65-ccd5-4192-8757-bc783f929671/bosch_pbh_2100_re_rotary_hammer_drill_chuck.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a508f530-e328-4773-94d6-01d15074a1c8/41317511633.pdfIn PDF document text
    • http://nodimetonakijeb.epizy.com/39180572088.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_off0001264e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1264E 5008 bytes
SHA-256: 105b9cf0c5e47ad8aae6d0b9193ee80f360168627bd8420d93fc2b391f9e1ddd
font_01_sfnt_off00013751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13751 10900 bytes
SHA-256: 6c1d9b12df5b7bbe713905a6f1da05345133c74499e46d8537676eba32021080
font_02_sfnt_off00015c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C37 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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