Malicious PDF — malware analysis report

Static analysis result for SHA-256 6751bda637695211…

MALICIOUS

PDF

82.6 KB Created: 2021-03-13 21:32:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 26c7b0940224cca10ac66352e082162d SHA-1: 48b7139910d032e759a8fa45835f7f3c6674cb97 SHA-256: 6751bda637695211e5478ea7c21bbce8ab52cfdf6ca609c330d81e32a043c66c
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The embedded URLs, such as the one related to a game hack, are likely lures to trick users into visiting compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/wix?keyword=naruto+x+boruto+ninja+voltage+hack+mod+apk PDF link annotation
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/825d9abc.pdfIn PDF document text
    • https://vebuwume.weebly.com/uploads/1/3/5/3/135349689/bikuteluluwinaw_monin_divejoze_talame.pdfIn PDF document text
    • http://bobiruropiles.22web.org/bayesian_population_analysis_using_winbugs.pdfIn PDF document text
    • https://sukigemanewa.weebly.com/uploads/1/3/2/6/132681928/totixuvipojazuv-bejodaxezu.pdfIn PDF document text
    • https://vowizata.weebly.com/uploads/1/3/1/8/131856430/xukinuzalapumolakiw.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/talijusepokur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381085/normal_6018f17b935ce.pdfIn PDF document text
    • https://vesixogis.weebly.com/uploads/1/3/4/8/134863987/f885319d.pdfIn PDF document text
    • https://wunanowadile.weebly.com/uploads/1/3/4/6/134600652/3179155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482645/normal_5fdc5fa48544e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385214/normal_5ff0e2be50929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404740/normal_601b7d08419e0.pdfIn PDF document text
    • https://givunanisu.weebly.com/uploads/1/3/4/8/134848628/d5f9df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481164/normal_5ff5f9c65c4c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411714/normal_60275c9bad116.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488102/normal_6039f22dbece0.pdfIn PDF document text
    • https://vidiwubiref.weebly.com/uploads/1/3/0/8/130874646/5038027.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448341/normal_60360eec7009b.pdfIn PDF document text
    • http://jepekimeba.iblogger.org/divergent_book_review_essay.pdfIn PDF document text
    • http://zabolojisag.getenjoyment.net/92055942389.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475382/normal_5fe52bdbe7300.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rupeguv.epizy.com/oneplus_android_10_dark_mode.pdfIn PDF document text
    • http://xeviwunukogula.epizy.com/writing_winning_business_proposals_download.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0D 2900 bytes
SHA-256: 40ce0bc9b113ef031639604f059b60aa9f1e41b097d60e75bfbf620cccc66306
font_01_sfnt_off00010451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10451 5688 bytes
SHA-256: c2e3dd2e0d83b22eea3ace6cdc1ba1dce1450465fd4326fedeaa41824ff694ab
font_02_sfnt_off00011790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11790 10768 bytes
SHA-256: 6f2afbc0062c84dc9a2c0a0a7446285170f3f339152f9918cd7d96b3e229ff49