Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2e72f8f426f57f…

MALICIOUS

PDF

83.9 KB Created: 2021-02-14 02:03:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 31cea0f22e4404fd4892b65b66195a49 SHA-1: 766f0c3f73072afcdfdd55b2c3a547881e4e72ce SHA-256: 2c2e72f8f426f57f364e869788bfa9c70f0535ee256daff6b2b73e5d7cd7d92f
226 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple suspicious URLs, including one disguised as a character sheet, points towards a lure for users to click on malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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/wix?keyword=pensacola+cox+tv+guide PDF link annotation
    • http://lngcliente.com/4878292709zrlw6.pdfIn PDF document text
    • https://cdn.sqhk.co/miloxuso/xlGpXja/bokoti.pdfIn PDF document text
    • https://cdn.sqhk.co/jupujezaxa/jehjhgQ/xisukudefujodifoduj.pdfIn PDF document text
    • https://xizadububexo.weebly.com/uploads/1/3/4/5/134595199/9982901.pdfIn PDF document text
    • http://rirelavemug.iblogger.org/11391293311.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/VThfhjO/65071176034.pdfIn PDF document text
    • http://securityofusersdevicesonline.site/outbreak_undead_2nd_edition_character_sheet4s0d5.pdfIn PDF document text
    • https://telidububiz.weebly.com/uploads/1/3/1/4/131452987/5319666.pdfIn PDF document text
    • https://cdn.sqhk.co/niripakexad/chahai1/cardinal_quest_2_spyglass.pdfIn PDF document text
    • https://buwavazazaradig.weebly.com/uploads/1/3/3/9/133999961/zalidedube.pdfIn PDF document text
    • https://cdn.sqhk.co/norumuwapa/eKJmx2L/11710746605.pdfIn PDF document text
    • https://bipipabogudas.weebly.com/uploads/1/3/1/1/131164499/wufejilukolipapamoxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://doroxepazu.epizy.com/90256138692.pdfIn PDF document text
    • http://wutodabegaf.epizy.com/34817713081.pdfIn PDF document text
    • http://muxajetolalet.epizy.com/rondo_capriccioso_violin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/5996706754.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/xojon.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/zamuvazug.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_off00010c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C87 5140 bytes
SHA-256: 2a95d1455f46298d6e3089a64288be9c564c6bc1254f4c721ad30455fdef6ac1
font_01_sfnt_off00011e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E21 10616 bytes
SHA-256: 2c8d3ec04923b9bbd749bdb882f57ede13a53bb4cad9d53bd03ad8b0ed471ecd

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