Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c09ffc340834b2…

MALICIOUS

PDF

69.8 KB Created: 2021-02-03 12:28:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1daa98ffe95b6c2b92b0fdbef2db3297 SHA-1: 9bf5aa5f67ce1cfcd95c44653f5d744c1b9a95f1 SHA-256: 69c09ffc340834b29c7aa41f4f9a58bc663ea9afe7b699a4793ce10a69108b87
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified as a PDF SEO link farm, pointing to suspicious domains like http://conicppjry.bid/87561196019f8b9n.pdf. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The embedded URL https://leonvi.ru/123?utm_term=andrew+stoecklein+suicide further supports the phishing or malicious redirection intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://leonvi.ru/123?utm_term=andrew+stoecklein+suicide PDF link annotation
    • http://conicppjry.bid/87561196019f8b9n.pdfIn PDF document text
    • https://wirupexulabajes.weebly.com/uploads/1/3/5/3/135322132/3196242.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/5hhhejc/lenovo_ideapad_3_15._6.pdfIn PDF document text
    • https://fipuzogafugigen.weebly.com/uploads/1/3/4/1/134108551/bolowikiladaw.pdfIn PDF document text
    • https://votuwokikinoso.weebly.com/uploads/1/3/4/4/134466575/6481280.pdfIn PDF document text
    • https://cdn.sqhk.co/kizafizutuw/gj3oCig/rummikub_online_with_friends_without_facebook.pdfIn PDF document text
    • http://freshka.fun/furia_de_titas_2_completo_dubladon7t32.pdfIn PDF document text
    • https://cdn.sqhk.co/tubadaluzafu/3jbheRK/mobile_ringtones_love_songs_telugu.pdfIn PDF document text
    • https://xadupokunarufi.weebly.com/uploads/1/3/2/7/132710624/sikizezubo.pdfIn PDF document text
    • http://item-get.top/jenkins_tutorial_tutorialspointnkaee.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/pukomofinarasifebubo.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/piwanisaj/lefifusebililovekuge.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/upload_to_wordpress.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/rusadowuziludazebofive.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/email_letter_template_outlook.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_off0000d4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4EF 4868 bytes
SHA-256: 1d66e5e41df08c182a54c649084a5c869b41f61861f062e5b60c8b14f4db211c
font_01_sfnt_off0000e5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A4 10824 bytes
SHA-256: 377622d07acf39893b11b14d09e167c13b69aab413eaeee69b43ac3da5d4806f

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