Malicious PDF — malware analysis report

Static analysis result for SHA-256 843b417832962962…

MALICIOUS

PDF

76.5 KB Created: 2021-04-03 06:02:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d543a1d504512bd7cde2b3396cebece SHA-1: e2f73677addee231e5be384f2cfb28088f9d3eae SHA-256: 843b417832962962c7f9de9f59c5f26c6524716c15b10f1a0a408324e2dac5f3
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs and embedded URLs. Although the document body is heavily obfuscated, the overall context suggests a phishing attempt or a downloader for further malicious content. The presence of embedded URLs points towards a potential T1059.007 (JavaScript) technique, commonly used in malicious PDFs to redirect users or execute code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://zurokexotuv.weebly.com/uploads/1/3/1/3/131384071/liwaluniripodarabojo.pdf
    • https://nomomiwadij.weebly.com/uploads/1/3/3/9/133997716/19167.pdf
    • http://forajadafogaxuv.medianewsonline.com/ck_prahalad_fortune_at_the_bottom_of_the_pyramid.pdf
    • https://likerediweraj.weebly.com/uploads/1/3/4/6/134691167/ruzasagelatisi.pdf
    • http://wilidelefuguki.22web.org/physics_numerical_book_in_hindi.pdf
    • https://gukufevekexuse.weebly.com/uploads/1/3/5/3/135305262/salubopanidefif.pdf
    • http://bajelow.iblogger.org/washington_redskins_2020_schedule.pdf
    • https://vebipebetas.weebly.com/uploads/1/3/4/0/134012388/xufudetixite.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://feedproxy.google.com/~r/wb/ENAH/~3/mO-5lVq97NI/wb?keyword=d&d%20dungeon%20tiles
    • https://9fbeb193-358d-48fe-b9d9-45f8b63f6b3c.filesusr.com/ugd/ab67b9_5809837d034d4b42929e27784ae31027.pdf?index=true
    • https://s3.amazonaws.com/takateg/popcorn_gift_card_holder_template.pdf
    • https://s3.amazonaws.com/wenobagupexekap/90254677062.pdf
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_c0c6f00dc7014f73b0016f5230228152.pdf?index=true
    • http://zekovulelopur.epizy.com/jevekajirixad.pdf
    • http://ratesedefavure.epizy.com/zamonavopixeno.pdf
    • https://s3.amazonaws.com/fulazelof/zogokigavizosakuvikon.pdf
    • https://78fc25e8-d533-4ec3-a480-3617e8cc0d4b.filesusr.com/ugd/aa5866_b2d1039a75044ec8825501eead67742c.pdf?index=true
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_27d172c828bf4964a6b8916e4fe584d7.pdf?index=true
    • https://s3.amazonaws.com/farokof/simazigodabodoripokubiku.pdf
    • http://bejanifezilo.atwebpages.com/69255001918.pdf
    • https://s3.amazonaws.com/zidosozawok/totovoxagatofopikunuw.pdf
    • https://s3.amazonaws.com/pajukovuxetu/instagram_for_macbook.pdf
    • http://raxusitusumulag.rf.gd/masesifefowebek.pdf
    • http://nukivamo.myartsonline.com/2505389778.pdf
    • https://s3.amazonaws.com/punurum/fakip.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_off0000e750.bin
2471a082485c14a92c05fb947e5d69b4875dfe694e01d159f780535fa91aa178		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE750 3484 bytes
font_01_sfnt_off0000f2bd.bin
515da8af0a4684836411be9d7babe77516f1ecd287f73d61545af9d2f3f81186		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BD 10640 bytes
font_02_sfnt_off00011737.bin
ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11737 4324 bytes

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