Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9b04b389913bb2c…

MALICIOUS

PDF

98.8 KB Created: 2021-04-02 07:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ee7bfacf17bdc00cd07e9a99766471c SHA-1: 3a0dca26e2d6f9143b09f30b50f9bab1feb09a11 SHA-256: c9b04b389913bb2c42842a69acd5c7a311fa24f4db55d62e133b27878a1f6515
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to redirect the user to a malicious website. The document body, though heavily obfuscated, contains strings related to product parts, suggesting a lure to entice clicks on the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/aws?utm_term=zojirushi+bread+maker+bb-cec20+parts
    • http://wixujikubipom.mygamesonline.org/nt_school_calendar_2020.pdf
    • https://cdn.sqhk.co/nilimijano/ZiejfHE/modern_sofas_for_sale_uk.pdf
    • http://penodesige.iblogger.org/samsung_rf267abrs_manual.pdf
    • https://zadopelujon.weebly.com/uploads/1/3/4/8/134884154/3818659.pdf
    • https://cdn-cms.f-static.net/uploads/4369905/normal_604b70d36af24.pdf
    • https://cdn-cms.f-static.net/uploads/4376602/normal_6064fd557c06c.pdf
    • https://cdn.sqhk.co/bomoxale/Zd7ZChi/share_files_my_cloud_home.pdf
    • https://static.s123-cdn-static.com/uploads/4405638/normal_5febb0154c082.pdf
    • https://cdn-cms.f-static.net/uploads/4369648/normal_603c0e3e9fe3f.pdf
    • https://cdn-cms.f-static.net/uploads/4449793/normal_5fd61f1a94757.pdf
    • http://ladujose.sportsontheweb.net/12496406203.pdf
    • https://cdn-cms.f-static.net/uploads/4464739/normal_603b722eb4fdb.pdf
    • https://totidulabi.weebly.com/uploads/1/3/1/6/131606487/nunabirijobar-tegozirufed-vomefewoso.pdf
    • https://lovarewido.weebly.com/uploads/1/3/4/3/134322716/6074864.pdf
    • http://zonuvak.medianewsonline.com/aws_infrastructure_tutorial.pdf
    • https://cdn.sqhk.co/wadelovelo/jdhdgiM/67778069600.pdf
    • https://golasirase.weebly.com/uploads/1/3/1/3/131384643/677206.pdf
    • https://cdn-cms.f-static.net/uploads/4472491/normal_60300036e5c30.pdf
    • https://rokojilezel.weebly.com/uploads/1/3/2/3/132302907/lasesokubijajuwom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vogojitipam.epizy.com/tuvuriwamogidasawuganukaw.pdf
    • http://padegijogul.atwebpages.com/yii2_documentation.pdf
    • http://nerebadaguve.epizy.com/jidokironivabajid.pdf
    • http://dexadusoxeb.atwebpages.com/awl_vocabulary_list.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_off00013489.bin
a1c9e5f9d1920d4ffb0fda534d35a85fbafe191b27faded540c79184d442efec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13489 3092 bytes
font_01_sfnt_off00013f9a.bin
1315e46d33968269ab2f1b28fd47608774f2f46b1281d0374d61ee9b8ebfbe86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9A 5824 bytes
font_02_sfnt_off0001534a.bin
42e417ea5fcac33bf3937a39d9300280d3ebe3f3c587a919463b0ca9d1035a55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1534A 12348 bytes

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