Malicious PDF — malware analysis report

Static analysis result for SHA-256 16513aa96cce11b4…

MALICIOUS

PDF

87.6 KB Created: 2021-04-18 04:39:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66036874d2566fd12224f94fa77e5623 SHA-1: bc9a2eeafa74672ea91d462802b3e5779d37053d SHA-256: 16513aa96cce11b424a81daf39a18075b8902733e956f1020cdf026ff812041b
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, containing embedded URLs that lead to suspicious domains. The presence of embedded URLs suggests an attempt to redirect the user to malicious content, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=what+are+the+different+types+of+traditional+literature
    • https://cdn.sqhk.co/mirusopujame/YjdsjbR/walking_dead_zombie_wiki.pdf
    • http://wimebenese.getenjoyment.net/9095192953.pdf
    • https://sawefewukiwow.weebly.com/uploads/1/3/1/4/131406412/f13eb840572783b.pdf
    • http://zefujixa.mywebcommunity.org/80993192077.pdf
    • http://zujewubowufonug.scienceontheweb.net/mk_pandey_analytical_reasoning_free_download.pdf
    • http://padojobimo.mywebcommunity.org/vutazuritede.pdf
    • https://guwemegarorara.weebly.com/uploads/1/3/4/3/134353603/8cba71e193.pdf
    • https://lolorude.weebly.com/uploads/1/3/0/7/130775760/vodafevuzub_wojasasumuzino_titavevijemeve_kikoki.pdf
    • https://lisevududotuwak.weebly.com/uploads/1/3/4/2/134265384/9566419.pdf
    • https://sukanoxe.weebly.com/uploads/1/3/1/4/131453950/powewot-barubevamowujow-jabokusupeg.pdf
    • http://dikagowoxi.sportsontheweb.net/fidolowebid.pdf
    • https://cdn.sqhk.co/zisuxemop/giij1mG/freeze_dried_food_good_for_dogs.pdf
    • https://cdn.sqhk.co/sifalavuxozo/gcNjagc/free_puppy_wallpapers_for_desktop.pdf
    • https://loseseseveru.weebly.com/uploads/1/3/0/8/130813975/xadadimifide-tefugakozika.pdf
    • https://cdn.sqhk.co/goropakuvoge/tgcNeLv/asap_rocky_babushka_boi_mp4.pdf
    • https://tafibukazun.weebly.com/uploads/1/3/5/4/135400045/4623803.pdf
    • https://cdn.sqhk.co/gupimupiset/eehfAia/brimstone_haunted_hayride_video.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/658f2e18-a978-4402-86e8-426c68b9d6e6/2001_subaru_outback_catalytic_converter_california.pdf
    • https://uploads.strikinglycdn.com/files/eca45b44-bb5b-4fd8-a668-bde64e5d55d3/integral_cos_x_1sin2x.pdf
    • https://uploads.strikinglycdn.com/files/863dac2f-4448-4f9d-a8b9-85fb46a752cc/55831585634.pdf
    • https://uploads.strikinglycdn.com/files/567fbab7-915e-4362-b05a-207234f676cb/suunto_x-lander_watch_band_replacement.pdf
    • https://uploads.strikinglycdn.com/files/4fbce29f-ac45-475b-80ce-08ff9930574b/amc_10b_2020_problems.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011892.bin
5895538461a1d5649a2e1ec5fec88181c142c0ba67f62447d291f64435f498c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11892 5244 bytes
font_01_sfnt_off00012a78.bin
6ad82f4f3af5e8a7f050cad2e7f0698f494134d3344f3d295740e92f91558e62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A78 11428 bytes

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