Malicious PDF — malware analysis report

Static analysis result for SHA-256 c49878f10fee74dc…

MALICIOUS

PDF

89.2 KB Created: 2021-03-16 01:34:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e3a8a0ab8d94da664d200d5a08f33f4 SHA-1: 2ab94d1d0170fa9e4bbc226d35388b589ff55620 SHA-256: c49878f10fee74dc29d2af59ec2964ff6610f6357aa66a9a8efcd793c26ea0c4
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, indicating a phishing or trojan payload. It contains embedded URLs pointing to potentially malicious domains, suggesting it is used to deliver a second-stage payload. The presence of PDF_URI and EMBEDDED_URL heuristics further supports this, indicating the document attempts to redirect the user to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xezojetit.ru/123?utm_term=linux+administration+pdf+book
    • https://zibefaxad.weebly.com/uploads/1/3/4/5/134594794/36240818b.pdf
    • http://xenejesujotolud.mypressonline.com/yourkit_java_profiler_tutorial.pdf
    • https://zeradukiw.weebly.com/uploads/1/3/4/8/134883462/33941d9.pdf
    • http://mitedujonajezed.scienceontheweb.net/51095714926.pdf
    • http://infonewsuk.site/pizefuvwn5w.pdf
    • http://uaregroup.com/asian_stock_market_futures_real_timebnjme.pdf
    • https://gefobivuvevu.weebly.com/uploads/1/3/1/3/131380717/nonobimufirefonurino.pdf
    • http://gukabibus.mygamesonline.org/20519997081.pdf
    • https://nejalebemenogun.weebly.com/uploads/1/3/1/0/131070187/vagajuz-valebotopuke-xebodadedura-bazokababamovut.pdf
    • http://fidekeleko.medianewsonline.com/python_programming_book_in_hindi_download.pdf
    • http://dalifajebuxog.scienceontheweb.net/is_acura_tl_expensive_to_maintain.pdf
    • http://tibetterrier.ru/interview_questions_for_teachers_assistant_positionztq6n.pdf
    • https://tunuwadubozowe.weebly.com/uploads/1/3/4/3/134363043/8483293.pdf
    • http://zusiwibewire.mypressonline.com/fijikoxipareregese.pdf
    • http://vumajufeboxidik.mywebcommunity.org/arduino_uno_tutorial_for_beginners.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/wujodibu/thermodynamics_test_questions_and_answers.pdf
    • http://sonisan.epizy.com/overwatch_lucio_advanced_guide.pdf
    • http://kexemejalo.epizy.com/92563621775.pdf
    • http://vobogiv.rf.gd/badowuwawigarajizon.pdf
    • http://fivadez.rf.gd/45735584677.pdf
    • http://bolirazebaf.myartsonline.com/the_chemistry_brand_retin-oil_-_100ml.pdf
    • https://s3.amazonaws.com/tuxexi/how_to_make_bradley_smoker_pucks.pdf
    • https://s3.amazonaws.com/vavejijitatofu/48202642455.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_off000112a5.bin
0440edd9aa3faffd24411ec8844b095efc419ae76ce88acc1e08615ed7a9e749		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112A5 5132 bytes
font_01_sfnt_off000123f7.bin
b237cf170de67520b8d623f3881c2c095af3238d114e0ebbb47d3822b6010c60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123F7 10868 bytes
font_02_sfnt_off000148ef.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148EF 4324 bytes

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