Malicious PDF — malware analysis report

Static analysis result for SHA-256 be98dfe78f8d3717…

MALICIOUS

PDF

81.6 KB Created: 2021-04-20 04:36:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: cbe843baff6348f45c0cc47dbf6c1080 SHA-1: 0490b21ae45c8989c5645ac342fa7cad2fe41f4c SHA-256: be98dfe78f8d37172ffffc87f02e078e251f46e767fad0ed82ab861cd6ad53e6
134 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external links, including one to 'baarspo.ru', suggests a phishing or malware distribution scheme. The 'SE_DOWNLOAD_BUTTON' heuristic further supports the attack pattern of luring users to click on links, likely to download a secondary payload or navigate to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/strik?utm_term=how+to+assemble+shark+navigator+dlx PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377933/normal_5fed1053de757.pdfIn PDF document text
    • http://kubosikavudux.mygamesonline.org/loxemotabofijaki.pdfIn PDF document text
    • http://riwozizedilar.mygamesonline.org/97489860855.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476142/normal_6017190e60e06.pdfIn PDF document text
    • http://lenugaguv.medianewsonline.com/sovolupozusedepomavun.pdfIn PDF document text
    • http://tegubija.mypressonline.com/dk_chinese_english_visual_dictionary.pdfIn PDF document text
    • http://luxuwum.mypressonline.com/data_warehouse_concepts_with_examples.pdfIn PDF document text
    • http://indonesia2health.online/29955639114tvqim.pdfIn PDF document text
    • http://gloslides.com/art_wallpaper_iphone_7_plusf1ud6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454543/normal_603bd386776c1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mafujegimeti.rf.gd/how_to_summon_spirit_in_smash_bros.pdfIn PDF document text
    • http://nakabamafirek.epizy.com/padokedejorusenebuwirepoj.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/fejinugizaraweb.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/tubegaxe.pdfIn PDF document text
    • http://bumurulepowele.myartsonline.com/11654399235.pdfIn PDF document text
    • http://bijolijufapida.rf.gd/51633534891.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/formal_dresses_winter_2019.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA4 5624 bytes
SHA-256: 78c3486b56c6ec3eb525afd8fbd490ff244bba52ab56cfa67df741a4edf35a50
font_01_sfnt_off0000ffa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA6 10572 bytes
SHA-256: f0f135da5ecc9e84d85fb8338adb490bb3bdb9131394e2a0f691d25b52ffa57c
font_02_sfnt_off000123d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D8 16232 bytes
SHA-256: 1d4ebd634e9a4b1afc3ba2e660f7abdbad7ecfb3c20c2fb0daf688bec4f9a1d5

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