Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d1e43ea6a4c129…

MALICIOUS

PDF

129.0 KB Created: 2021-03-28 22:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 428e8ab96dc87c5b2c700af5e1730b9f SHA-1: 6bd07315ebc859ba36a656e352476b451b65be5f SHA-256: a2d1e43ea6a4c129715c156ba615a7297ebee00293e0ac8f9b77358e891f063b
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI pointing to a suspicious domain, identified as malicious by ML classifiers and ClamAV. The document body, though heavily obfuscated, suggests a lure related to medication, which is a common tactic for phishing or malware distribution. The presence of an external URI indicates an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/award?keyword=cefaclor+375mg+5ml+bula+pdf PDF link annotation
    • https://cdn.sqhk.co/kurotevu/idHdpsa/amtrak_car_train_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/luwagoma/ggha7ib/23989957080.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/2hbBzGR/complete_history_of_the_universe_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381997/normal_5fe321a0d18f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448548/normal_5fcf07ebbdde3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380073/normal_600b4fc315760.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvajuvewuj/eihrNhc/11169066776.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CqLhfN7/localizar_mi_android_por_gps.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pepezuvizomu.rf.gd/65559033001.pdfIn PDF document text
    • http://wagadepepixapu.epizy.com/harlequin_romance_novel_submission_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/kuzexutamerepazojige.pdfIn PDF document text
    • http://lamekukibudinos.epizy.com/jazava.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/nedixebixevifu.pdfIn PDF document text
    • http://kubuxakul.epizy.com/24118348675.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/danewe.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/subtracting_similar_fractions_worksheets_grade_4.pdfIn PDF document text
    • http://binaxasomeroxat.epizy.com/avira_free_antivirus_2020_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/kamezexiziwamuvad.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/agilent_33220a_software_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/95908045935.pdfIn PDF document text
    • http://suzujikuluvujov.rf.gd/ultimate_mortal_kombat_3_shang_tsung_transformations.pdfIn PDF document text
    • http://ribowiga.epizy.com/autocad_course_material.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/43159701954.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_off0001b4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4A8 5712 bytes
SHA-256: 2f08ae3baa68cca7fbb3a624e2645625dadb1fadc9791ad12281cb0f08177c65
font_01_sfnt_off0001c806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C806 14960 bytes
SHA-256: 7244b7420db641bccae20ef759f4f5f3486cd64b09380118da2644be42950cb3

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