Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eccc68401abbbee…

MALICIOUS

PDF

69.5 KB Created: 2021-05-14 07:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b1b12daa1e7bcc6c2fef23dbd2984866 SHA-1: 4c0c0b864ee5e39e3cdf576b6667643c705018b7 SHA-256: 8eccc68401abbbee29151da61bb533604393fc4e965fea58332cf5a9fe6fec06
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though truncated, suggests a lure related to 'Information security for dummies pdf', likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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=information+security+for+dummies+pdf In PDF document text
    • http://vbnmcxz.xyz/vorabokenewuzor9ct0s.pdfIn PDF document text
    • http://leadtop.co/rcbs_reloading_dies1ww45.pdfIn PDF document text
    • http://hustlinmoney.com/3_girls_one_guy7gm17.pdfIn PDF document text
    • http://stroiline74.ru/48053519514dcp26.pdfIn PDF document text
    • http://crubr.space/how_to_turn_off_ottlite_night_light1b3of.pdfIn PDF document text
    • http://kkkirrreeee.space/mabolewomor8qzn8.pdfIn PDF document text
    • http://prosucre.pro/268016006276av4v.pdfIn PDF document text
    • http://moscow-siberian-force.online/ranco_nema_4x_electronic_temperature_control_manualgfe8c.pdfIn PDF document text
    • http://regvoolkim.website/879044258554n57l.pdfIn PDF document text
    • http://bijatutolime.iblogger.org/17800748974.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ddc7b23b-31e5-4b5c-aaad-d3b7cef26861.filesusr.com/ugd/e506b8_7e939c6df52a44a19f8f540d5022dcd8.pdf?index=trueIn PDF document text
    • http://pewavifasovifuz.epizy.com/2016_ford_f-250_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/10866421944.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/descriptive_comparative_research_design_definition.pdfIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_13ceb49c9266449091c9a8cbdf128523.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zexozavo/dell_poweredge_2950_memory_configuration.pdfIn PDF document text
    • http://gewuvuvemaguda.rf.gd/african_american_history_book.pdfIn PDF document text
    • http://weralawubuzeg.epizy.com/lung_transplant_immunosuppression_guidelines.pdfIn PDF document text
    • http://puzekuzabi.epizy.com/manual_de_capelania_hospitalar.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34A 5308 bytes
SHA-256: 95351a48c52bae9cefb2b80fe685ffb455ab962ce3d7e6015cf7a49cc34ce1a0
font_01_sfnt_off0000e54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54D 10276 bytes
SHA-256: 8655a5f2ef969b3b3de3c2343fd330037b7253a252f1aa81f43589c2d335945c

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