Malicious PDF — malware analysis report

Static analysis result for SHA-256 1960f8fd508caff1…

MALICIOUS

PDF

70.9 KB Created: 2021-03-25 04:17:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdb0d6ffedd0c6f4961bb2cce6001a0b SHA-1: cec89024c4a68b2e560bd215e0de58ae4c0983df SHA-256: 1960f8fd508caff125642de325334fd5359b41b0860790185e5d628c3b815922
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are designed to mimic search engine results for 'trojan war worksheet pdf'. The heuristic firings indicate this is a link farm designed to direct users to malicious or phishing sites. While no scripts were explicitly extracted, the PDF structure and extensive URL farm suggest an attempt to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/wix?keyword=trojan+war+worksheet+pdf
    • http://bitcoinlearningcentre.online/cbse_class_9_syllabus_reduced_2020-_21z6pr3.pdf
    • https://cdn.sqhk.co/semobisugigi/hAZBgdp/gifexejexasi.pdf
    • https://ginupegoforijef.weebly.com/uploads/1/3/4/7/134760486/702049a5e0760ef.pdf
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/valowixajifiguz_jafevemi_demozugine.pdf
    • https://cdn.sqhk.co/monazaxumol/gcdI1Gv/xopud.pdf
    • https://cdn.sqhk.co/jigitovewuk/idbSC8I/sunogunowowaf.pdf
    • https://cdn-cms.f-static.net/uploads/4463034/normal_605073bf30e8e.pdf
    • https://cdn.sqhk.co/denepepunuja/ibjimhf/sage_the_gemini_new_song_2019.pdf
    • https://cdn-cms.f-static.net/uploads/4390995/normal_604e74c6d3858.pdf
    • http://grenkasalo4.xyz/lothian_pension_fund_annual_report_and_accounts8s2fm.pdf
    • https://nunewefumeko.weebly.com/uploads/1/3/4/3/134307525/6162879.pdf
    • http://akvatehnika74.ru/saint_seiya_awakening_hack_apkwsibv.pdf
    • http://portkamesto.site/nibufokopoxe6hy4l.pdf
    • https://cdn.sqhk.co/zatovafer/xA2zjht/avast_antivirus_for_android_mobile.pdf
    • https://sapesikunudob.weebly.com/uploads/1/3/1/3/131398489/dopuselol.pdf
    • https://cdn.sqhk.co/leluforeref/bjcz3Jy/luwenoderodu.pdf
    • https://static.s123-cdn-static.com/uploads/4393363/normal_5feceff702f1e.pdf
    • https://zapijuwubasu.weebly.com/uploads/1/3/4/8/134866543/5e430f14.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d5fd0048-bb8d-45a1-ba21-28d1cb0b7162.filesusr.com/ugd/5e8de6_50a38d629b8d41d6986ab98bd3a3ca60.pdf?index=true
    • https://2178e3ec-2e0a-46e0-af35-d8a6fdfeb21a.filesusr.com/ugd/c411cf_67cc076150ad4eeeac7c9dbc6b49653f.pdf?index=true
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_c9a4fd8665af4154b6c07d6d3a83beb5.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_off0000d66d.bin
4258156761920ea47e88802a0a94cb6ba0bc061186b290b4cbd0fefffb3c088c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD66D 5280 bytes
font_01_sfnt_off0000e873.bin
50cff5ae8452a02daa0abd95ecf4dc92a134d5aceb504e6d75ccb25d02148a8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE873 10960 bytes

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