Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3a85f1513c12c1…

MALICIOUS

PDF

70.0 KB Created: 2020-12-08 11:55:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7f76add51c3cf92c4562a51f669b8cda SHA-1: 1f37f478f8d8d66ae3debf87860a9c2a4f2118ca SHA-256: ea3a85f1513c12c1b2b7df2e9eb4412f201fc9d1b992bdb376d1ac84066bf2b5
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffking.ru'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates malicious intent. The embedded URL is likely used to lure the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffking.ru/123?utm_term=click+clack+short+story In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376621/normal_5f9890deb9b9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380082/normal_5f92d4848837a.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/jalasilunaz/7092429263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98c1aad3-c602-495f-aba7-cb26d300d870/introduction_to_mathematical_programming_winston.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/bluebeam_vu_2017_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/rupur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1711a06-8941-41fb-b2bf-615e6c160583/milliken_publishing_company_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4257e1ca-d51a-44c7-8bc2-13d2211b2bdc/68509266183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac880d84-5a5f-4237-bce8-757e5bc8bd65/65070823606.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/ravijowoxiveva.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/betolusera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d2de9d3-0f65-49d7-93ee-7ff0c12fb208/veggietales_sumo_of_the_opera_part_3.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/offline_gangster_games_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9e2d3b5-9bc1-4e34-baff-4a70f20a5e43/facebook_messenger_apk_download_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/download_real_boxing_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb2595aa-6a58-4e49-b931-eab0a94baedb/dowerabaribugux.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_off0000d62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62C 4956 bytes
SHA-256: 5095b4cbbed31931c924af3a8f1d318555217efdc68efd0dbfbbc05135263b88
font_01_sfnt_off0000e706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE706 10296 bytes
SHA-256: b41b23b41ce94e7828dedef25f9e568af10113d330d2f638e472f6d4fb14eaf0

Open this report in the interactive analyzer, or submit your own file for analysis.