Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf005dc493148aed…

MALICIOUS

PDF

73.5 KB Created: 2021-02-27 14:40:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c24b8565ea349271d5aa69b6fa822183 SHA-1: 14901f07e4438a7ff53327d5edd59e22c341354f SHA-256: bf005dc493148aed0c2d532a60f0a8601d04e2f8ba451b1ccb21a191a4fd20e2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO poisoning tactic. One of the primary external URIs, 'https://zajinet.ru/123?utm_term=philips+voice+tracer+dvt1250+manual', is presented as a search result for a product manual, indicating a lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://zajinet.ru/123?utm_term=philips+voice+tracer+dvt1250+manual PDF link annotation
    • https://nagaxubonafebax.weebly.com/uploads/1/3/1/6/131606673/e11c4ad6e.pdfIn PDF document text
    • https://zoriliwusitilo.weebly.com/uploads/1/3/4/4/134479822/b401b47a8.pdfIn PDF document text
    • https://vinedenakebuz.weebly.com/uploads/1/3/6/0/136020142/a1ad7.pdfIn PDF document text
    • https://beritugemob.weebly.com/uploads/1/3/4/3/134332724/5713462.pdfIn PDF document text
    • https://dogeneli.weebly.com/uploads/1/3/0/7/130776728/kogukuwida.pdfIn PDF document text
    • https://tajagarajoj.weebly.com/uploads/1/3/0/7/130776182/0a5f838fa3e.pdfIn PDF document text
    • https://wavasifowimuzog.weebly.com/uploads/1/3/5/3/135321241/2392442.pdfIn PDF document text
    • https://wiloropijevor.weebly.com/uploads/1/3/5/2/135299547/5648184.pdfIn PDF document text
    • https://cdn.sqhk.co/dusawugivepo/c0kheSV/totem_story_farm_mod_apk.pdfIn PDF document text
    • http://islemleriniz.org/79931186164t7n88.pdfIn PDF document text
    • http://salebox.shop/old_testament_bible_history_guidebooklmqjj.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/metubevozisul/tazumodaratufupivub.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/77567528604.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/interview_questions_and_answers_for_fresh_graduates.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/sokusela.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/performance_assessment_tools_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/constructing_the_centroid_of_a_triangle_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/repojitidenalepal.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/pivovodopefonizajufifu.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/cinema_hd_app_for_android_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/infection_control_guidelines.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_off0000e156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE156 5824 bytes
SHA-256: 8d93b635ffad0102204c35d078c595e1b7d34f235ce72bb7ca17e9367da74db8
font_01_sfnt_off0000f50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50B 10336 bytes
SHA-256: 8ff3600d5af43bef4a3006e09ae053c12335a4a8ec25cbb0b4841f2866be4cfb

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