Malicious PDF — malware analysis report

Static analysis result for SHA-256 559f72c8780b273f…

MALICIOUS

PDF

72.5 KB Created: 2021-06-08 13:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df8d4d3936b63816a25d88a07ff8a9ec SHA-1: c81b1ec4ec943cf754fd17f91071c79401d90656 SHA-256: 559f72c8780b273f930dc0b535f4dd8cf9800ef4f4157de1392da43442cbdb5a
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that appears to be a lure for downloading software. While no scripts were explicitly extracted, the nature of PDF malware often involves exploiting vulnerabilities or embedding malicious JavaScript to redirect users or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://huntic.ru/pbw?utm_term=blockman+go+beta+free+download+apk
    • https://cdn-cms.f-static.net/uploads/4425728/normal_60bf15d8a5bd0.pdf
    • https://patelevenimo.weebly.com/uploads/1/3/1/4/131437444/masujinetanuf.pdf
    • https://cdn-cms.f-static.net/uploads/4417327/normal_6052d80cbff36.pdf
    • https://cdn-cms.f-static.net/uploads/4454550/normal_603ce35824a24.pdf
    • https://runonidalebemi.weebly.com/uploads/1/3/2/6/132682230/d7c5d40ec9ca9d7.pdf
    • https://tepidupelagoxu.weebly.com/uploads/1/3/4/4/134472529/vogerefewib.pdf
    • https://cdn-cms.f-static.net/uploads/4469641/normal_6016a518a8dff.pdf
    • https://static.s123-cdn-static.com/uploads/4375521/normal_5fe2d15828a98.pdf
    • https://semotifivunadi.weebly.com/uploads/1/3/1/3/131380295/6d5242fdccb8cf.pdf
    • https://lipodemofuxe.weebly.com/uploads/1/3/5/3/135316225/badaradekal_jizabaxub_jilidubanema.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://povivokovawi.pbworks.com/w/file/fetch/144825360/gosuwinimopupizifoxitiwaf.pdf
    • http://wuwolufit.pbworks.com/f/how_to_reset_onn_earbuds.pdf
    • http://zevatirupura.pbworks.com/f/proshow_producer_6.0_full_crack__keygen.pdf
    • http://mumubib.pbworks.com/f/how_much_does_it_cost_to_file_a_quit_claim_deed_in_florida.pdf
    • http://guronavageba.pbworks.com/f/saw_2_full_movie_free_online_123movies.pdf
    • http://taxoxuf.pbworks.com/f/how_to_get_touchgrind_skate_2_maps_for_free.pdf
    • http://tujedet.pbworks.com/w/file/fetch/144729357/putepirufaf.pdf
    • http://ritijix.pbworks.com/f/qual__a_raiz_quadrada_de_324.pdf
    • http://lojefizowoj.pbworks.com/f/how_to_reset_kenmore_oven_model_790.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_off0000dc2a.bin
ba7867899bf523c976c79476809afbb9614a95af2ce9d1e4211a1c9b22fbed8e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2A 5644 bytes
font_01_sfnt_off0000ef59.bin
520fc747aa6dabca57e5a01b599dec1a0460c2b97f3972e9db2c7c7b9a8e50a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF59 11092 bytes