Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c7dafa71932a8e…

MALICIOUS

PDF

78.7 KB Created: 2021-03-18 20:27:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47db897e0471d73d3b108df5870e2daa SHA-1: d31a95946896af1f81bd4f90a4059b2bd0a91c10 SHA-256: b3c7dafa71932a8eed47ea14e732420d126d071f16ddbe9e50b9a118316abc32
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a suspicious domain, and ClamAV detected it as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to medical information. The presence of embedded URLs and the ML classifier's high confidence score suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/wix?keyword=how+to+find+someone%2527s+brachial+pulse
    • https://kibowoje.weebly.com/uploads/1/3/0/7/130775027/c5da3b08.pdf
    • http://vizazovabula.mywebcommunity.org/mini_smart_socket_manual.pdf
    • http://podarokinsta24.online/72545286438uyiz9.pdf
    • http://sukutoxuwurif.mywebcommunity.org/liquidation_of_joint_stock_company.pdf
    • https://gafujoneruxuf.weebly.com/uploads/1/3/4/7/134728567/nigalolisibuxal.pdf
    • http://kufafukedexepix.mygamesonline.org/16598896037.pdf
    • http://kalowodopole.mygamesonline.org/oxford_read_and_discover_level_2.pdf
    • http://rfs.team/1290021943lqwoy.pdf
    • http://tixokapine.mypressonline.com/what_commands_can_you_ask_alexa.pdf
    • https://cdn.sqhk.co/nebafori/eKgdhaY/95219179317.pdf
    • http://vugekowuzujed.scienceontheweb.net/ludonototifo.pdf
    • http://pukebebizadolu.mypressonline.com/glencoe_chemistry_matter_and_change_download.pdf
    • http://xojuxelase.medianewsonline.com/doxoguvunej.pdf
    • http://betmoy54.com/mathematical_puzzle_questions_with_answersvn932.pdf
    • http://italylife.pro/angry_birds_epicjlx3f.pdf
    • http://mosebuzixat.mywebcommunity.org/bobajaxefejavezum.pdf
    • http://tryraisins.club/throne_of_glass_download_ebookq0f11.pdf
    • https://kefozonijufan.weebly.com/uploads/1/3/4/6/134689321/6994820.pdf
    • https://cdn.sqhk.co/dazulegug/Tqhfjgc/80862756124.pdf
    • https://cdn.sqhk.co/gofejenizew/p71XjfK/getty_images_free_for_commercial_use.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2798ad78-d8bf-41ba-b348-f9479cca9886/is_the_beyond_sandwich_at_dunkin_donuts_vegan.pdf
    • http://gumizaxewa.atwebpages.com/76747150164.pdf
    • https://uploads.strikinglycdn.com/files/fd6cd4e1-0fbb-4cb8-92d4-af991dc0f596/71610902255.pdf
    • https://uploads.strikinglycdn.com/files/32153d99-573b-4a58-b19f-bb76ac7382c6/14767434911.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_off0000f59c.bin
80faa2c483fee44dace98d6c671a282292d39e09e77e2b2c4e98cb0e342cff7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF59C 5620 bytes
font_01_sfnt_off000108a4.bin
e41f13edc5c649b604d24ad96c3de7e7c4cf5f4d31c729e511c686b4cff9bd00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108A4 10740 bytes

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