Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa68b882443fdd73…

MALICIOUS

PDF

81.2 KB Created: 2021-05-06 05:40:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca33bd6448fb7480dd29492c6da9da5e SHA-1: 957974b21aaedd746b30ac381128f7d853d6ee84 SHA-256: aa68b882443fdd735b16a7baf95ec1dd83bf2a822ea697609cbdfb9db2402083
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that redirects to a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, appears to contain keywords related to search results, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xezojetit.ru/strik?utm_term=crosley+turntable+stopped+spinning
    • https://cdn.sqhk.co/tiwoxebu/dlhgjbe/gadoguzalopuvukoleta.pdf
    • http://bimoriz.getenjoyment.net/47287843395.pdf
    • https://sinukunub.weebly.com/uploads/1/3/4/4/134431456/8604249.pdf
    • http://geloritiveda.mygamesonline.org/12045855150.pdf
    • http://zegererevez.medianewsonline.com/advanced_level_english_grammar_test_with_answers.pdf
    • https://cdn.sqhk.co/tunixomaj/djj4Xw6/correct_the_sentence_worksheet.pdf
    • https://nasoluludeg.weebly.com/uploads/1/3/4/4/134435301/0ebdecc9734.pdf
    • https://cdn.sqhk.co/fifapupifig/RJijgcT/fabfitfun_fall_box_choices.pdf
    • https://cdn.sqhk.co/worupageke/Vaggiak/61965673767.pdf
    • http://gatowixipeba.mywebcommunity.org/91066027794.pdf
    • https://litunuvojiv.weebly.com/uploads/1/3/0/9/130969221/708687330.pdf
    • https://cdn.sqhk.co/wimedizi/3gfjTqQ/17332487594.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_fd15a31a9901460e9a3bd501d8026c08.pdf?index=true
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_935ad38e2ddc4c04ab4f43f1676e3e16.pdf?index=true
    • https://s3.amazonaws.com/lazesej/the_hardest_questions_youll_ever_have_to_answer_reddit.pdf
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_ac0d94839c184ea1a336db29f13cd05d.pdf?index=true
    • https://s3.amazonaws.com/dazovosugev/samsung_model_wa48h7400aw_aa.pdf
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_dec8740b15434189a6739f111f511c19.pdf?index=true
    • https://s3.amazonaws.com/papuja/java_programming_with_examples.pdf
    • https://s3.amazonaws.com/fipijife/far_from_the_tree_documentary_trailer.pdf
    • https://s3.amazonaws.com/batoragubukepo/how_to_assemble_greenworks_2000_psi_electric_pressure_washer.pdf
    • http://wozitoso.atwebpages.com/vuvuveju.pdf
    • https://08c3cc13-1ce0-4add-927e-a3aed263473e.filesusr.com/ugd/ccf397_53ad1a25c51941f387f7caf8fd4c6ee2.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fea9.bin
8877c47cda63f44577d8a35fe842efe399763af007649bd6774d46f4b0d2807a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 5276 bytes
font_01_sfnt_off000110a0.bin
ba68342b6a1deba4d1d3af5100bf6ad46f45f69b85fc39706ce522c1732d2374		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110A0 11448 bytes

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