Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d920d05e519ada…

MALICIOUS

PDF

76.3 KB Created: 2021-03-06 16:05:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 489a4d0ee87ca97b5a1f30f4f48abd4f SHA-1: bd9fba83a0c85ce06cc0d55eab09b0130bd61954 SHA-256: 38d920d05e519adafc59b836e5b66296def02ff4537e944c42b5756c35a92620
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to printer maintenance, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://leonvi.ru/award?keyword=hp+8600+clean+print+head
    • http://dorulezebum.sportsontheweb.net/tejelagud.pdf
    • http://kalides.22web.org/atlas_ti_para_mac_descargar_gratis.pdf
    • http://dilawiputonu.mypressonline.com/joxujozeguzi.pdf
    • http://ruluzuzadol.mypressonline.com/51762437228.pdf
    • https://static.s123-cdn-static.com/uploads/4462056/normal_5fe06e5953cc1.pdf
    • https://cdn-cms.f-static.net/uploads/4476941/normal_6040382a772c2.pdf
    • https://jasutabaxe.weebly.com/uploads/1/3/0/8/130873915/e56efcf8625.pdf
    • https://cdn-cms.f-static.net/uploads/4409604/normal_6039ce8a20114.pdf
    • https://likimipezerejo.weebly.com/uploads/1/3/2/6/132682052/bobufiw.pdf
    • https://cdn-cms.f-static.net/uploads/4424985/normal_604347925a189.pdf
    • https://vojutodebol.weebly.com/uploads/1/3/4/0/134096580/790df50bc53c93.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://perexuwofogefo.onlinewebshop.net/debumele.pdf
    • https://s3.amazonaws.com/zoromexemuzid/mebavuwiwidamarurebes.pdf
    • https://uploads.strikinglycdn.com/files/45ce8035-3231-44ca-95af-8395e1fe69ad/tilevojinozebu.pdf
    • https://uploads.strikinglycdn.com/files/6a1d5e43-265a-45d7-98c4-04780b3be367/pittsburgh_police_department_zone_3_pittsburgh_pa.pdf
    • https://s3.amazonaws.com/wunojipu/gymnopedie_piano_sheet.pdf
    • https://uploads.strikinglycdn.com/files/65ca1800-f4c1-4db7-a77a-3e80c289617f/hague_watermax_water_softener_price.pdf
    • https://s3.amazonaws.com/luxelula/best_app_to_learn_chinese_2019.pdf
    • http://sixofiwezuxowa.epizy.com/40067662789.pdf
    • https://uploads.strikinglycdn.com/files/33404a73-73bc-46fb-82c4-fcc3e591f90e/ps4_remote_play_macos.pdf
    • https://s3.amazonaws.com/jasipefulaxiduj/monthly_calendar_template_2019_editable.pdf
    • http://noxebujo.epizy.com/43956118190.pdf
    • https://s3.amazonaws.com/zerejibixupav/tesco_smoked_salmon_nutritional_information.pdf
    • http://kuwubuvorij.rf.gd/17008559465.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_off0000e281.bin
2c34ec2632bb276aaf19654be6b856f846e099c34aaf31f5fb989fa935b6f36c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE281 5112 bytes
font_01_sfnt_off0000f3bf.bin
4bad67d3d00f7690d0c8d42e61e6b175afddcb822ca49d10739fb9dba8df0df1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BF 10088 bytes
font_02_sfnt_off00011652.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11652 4324 bytes

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