Malicious PDF — malware analysis report

Static analysis result for SHA-256 f973aecaac0ba258…

MALICIOUS

PDF

80.5 KB Created: 2021-02-23 23:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 410cb24fe2d69de88e1ae0023a8d49fa SHA-1: 925a63077eddcf07cc0832c5ff49fd687e2801d2 SHA-256: f973aecaac0ba258a217650f76788b3d62ec33536af55b4abbcb789d54d95bf4
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/strik?utm_term=professional+growth+plan+examples+for+music+teachers PDF link annotation
    • https://cdn.sqhk.co/vixemujomu/Dhghiie/function_generator_basic_definition.pdfIn PDF document text
    • https://zegesunipatobas.weebly.com/uploads/1/3/1/3/131379774/weguv.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/Fgf0vhg/91672975125.pdfIn PDF document text
    • https://cdn.sqhk.co/jujadiziga/jeifMgf/fotefusewogokikikovakafe.pdfIn PDF document text
    • https://kagivosivozavex.weebly.com/uploads/1/3/4/7/134746508/beronaxobekudupogef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470024/normal_600d420f6c85a.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikureta/wIhephd/flags_war_of_spanish_succession.pdfIn PDF document text
    • https://cdn.sqhk.co/petebodok/jeNonjh/new_english_songs_2019_lyrics.pdfIn PDF document text
    • https://zaroralovez.weebly.com/uploads/1/3/0/8/130814195/6105318.pdfIn PDF document text
    • https://cdn.sqhk.co/futidiwe/9hadgim/strike_fortress_box_mod_apk_new_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486552/normal_601bb9b06c427.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384828/normal_5fed1f519640a.pdfIn PDF document text
    • https://turonobofudub.weebly.com/uploads/1/3/4/4/134463989/7878675.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/jgiJid0/srpg_legna_tactica_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/ibOqUoa/nugeze.pdfIn PDF document text
    • https://cdn.sqhk.co/nigezufi/BhkByie/777_live_casino_app_alt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479254/normal_5ffa4124745e4.pdfIn PDF document text
    • https://cdn.sqhk.co/gibewuzavi/iih8Wja/sniper_3d_man_in_the_balcony.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/4V7old7/52731125632.pdfIn PDF document text
    • https://nopeludaseji.weebly.com/uploads/1/3/3/9/133986928/4ae7e3ee8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368997/normal_601b3f93a54a2.pdfIn PDF document text
    • https://cdn.sqhk.co/totimujid/ghhgihz/zofufekejo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7D 5592 bytes
SHA-256: 29411f8a6eb1c74051ff2c81a37f4fa8319c12f5712db4f51e459e5da33259a8
font_01_sfnt_off00010f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F76 10680 bytes
SHA-256: 68b64c8825e47c7eff1e4128bd1ecd477450450be00f1ba30d118063337bed47

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