Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52e5d307882a5b7…

MALICIOUS

PDF

76.8 KB Created: 2021-04-04 12:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6eec278a106ccacfb6285448f8fc3bd3 SHA-1: 6ee20b22f2f103fdda6506f5df23722240660eb4 SHA-256: a52e5d307882a5b75b90527f83c66006763b978c4bb416388cd0e66e9b803cba
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a website disguised as information about an anti-inflammatory diet. This URL is likely a phishing lure to compromise the user. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/strik?utm_term=what+can+i+eat+on+an+anti-inflammatory+diet
    • http://supportcopyright.net/land_rover_discovery_sport_2016_manualh6r98.pdf
    • https://cdn.sqhk.co/zuwiwejagub/rlKpJje/32360960722.pdf
    • http://faladen.22web.org/52912826215.pdf
    • https://cdn.sqhk.co/gudopokobipa/jiifii6/posusifufikanigexur.pdf
    • http://maewallace.com/zilito037sa.pdf
    • http://gedawuxofawu.iblogger.org/convert_large_document_to_word_online_free.pdf
    • https://cdn.sqhk.co/naxupowu/gihaidW/5599_traffic_way_atascadero_ca.pdf
    • https://cdn.sqhk.co/jepipovi/jijevid/8844935165.pdf
    • https://cdn.sqhk.co/fosuzonarefi/f0ghbib/answer_love_myself_bts_english_lyrics.pdf
    • https://cdn.sqhk.co/jutirupot/jaFih5b/47858836039.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lixugojobipiwof.epizy.com/13126111543.pdf
    • https://uploads.strikinglycdn.com/files/936c15e6-574d-4431-8336-a9de350fa5d9/kukasejanuwutozigilabiz.pdf
    • http://luwidegudaje.epizy.com/chemistry_notes_class_9.pdf
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_936e5e9206da4bbb9393ef0a72e0d5d1.pdf?index=true
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_312cf3ef53324d31a4a9089f821079c9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/dfeefe3f-f7b2-4ff7-a901-dfe4add425b0/deraluxemokozen.pdf
    • https://uploads.strikinglycdn.com/files/9c2b10cc-ae90-4ced-8ce4-4fd6839b6f8a/lover_unbound_summary.pdf
    • https://89f68ddc-9f98-4e60-8afa-3e0ca6603e9e.filesusr.com/ugd/4725f1_266845e4ecf241ebb7bb7d0505a39f74.pdf?index=true
    • http://boxakuwila.epizy.com/portfolio_website_templates_wordpress_free.pdf
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_0f233b1158ae4e3d91864629b3efb9c4.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_off0000ef2b.bin
1a3ec4ca9db91b3653ece7a5b5dd5ef953ffbba1d4ab51655800796f76b3e119
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2B 5232 bytes
font_01_sfnt_off000100e5.bin
8e21d858cf004d84a0e87c1896305fc692b4f6e616d8d4ea4403a4b88cf7e041
pdf-font-stream PDF embedded font (sfnt) at offset 0x100E5 10884 bytes