Malicious PDF — malware analysis report

Static analysis result for SHA-256 e506d0ee2bb6568a…

MALICIOUS

PDF

72.3 KB Created: 2021-02-20 06:00:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7d9c6ebc7999eae41b455b3fae0a15fb SHA-1: 71142ee9c8757feaedf8269711cbdc62f499aaf5 SHA-256: e506d0ee2bb6568add37be7bfb89e5dd56a9a877eb61d1e76c3866d0d37978e8
184 Risk Score

Malware Insights

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

The PDF contains embedded links to malicious redirector infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, suggests a lure related to thermostat programming. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware download sites.

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://yafferge.ru/strik?utm_term=how+to+program+a+hunter+thermostat+44550 In PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/wutepumije.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/4891962429432exm.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/mjciihg/ravuxerunogagavadokoteja.pdfIn PDF document text
    • https://nalusopiko.weebly.com/uploads/1/3/3/9/133997408/zipufimew-jerogik.pdfIn PDF document text
    • https://cdn.sqhk.co/sixojifez/nRosjbD/biggest_corn_maze_in_iowa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420019/normal_5fc8354a2bed5.pdfIn PDF document text
    • http://de-bewertung-889562.icu/cars_3_characters_names2ucuz.pdfIn PDF document text
    • http://d2-club.ru/lulapepolekuxenoprotb.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/paL1iis/city_story_metro_apk.pdfIn PDF document text
    • http://rigipufefe.iblogger.org/enlace_fosfodiester.pdfIn PDF document text
    • http://bestrongbyg.com/jifijifupupesuw5601f.pdfIn PDF document text
    • https://luwuruguvuwotom.weebly.com/uploads/1/3/0/9/130969706/1361324.pdfIn PDF document text
    • https://libotavod.weebly.com/uploads/1/3/0/8/130813055/fusolobimade_gojelevuwunexej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/megelugik/9189115945.pdfIn PDF document text
    • http://jubuzixabes.rf.gd/coeliac_disease_uk_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/6583723110.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/android_google_account_password_recovery.pdfIn PDF document text
    • http://fizuxobitunoge.epizy.com/68959343667.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_off0000ddbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBF 5608 bytes
SHA-256: 8ca6641872afc1e4d1c287dd4c2611c407886a57afe09c55dd8df1e1ab8c908c
font_01_sfnt_off0000f0c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C3 10264 bytes
SHA-256: e4674c9875d9004886be78f157f5687095bc72daf53f4119f89bc0a8c4791ba3

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