Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed809f25875e5f1…

MALICIOUS

PDF

71.9 KB Created: 2021-03-27 20:17:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: be169d9543057b3d40fe727314981b5c SHA-1: a23aebc7fb677f04c424a74cd0e95281d2581dd3 SHA-256: 1ed809f25875e5f1129990b5516dffc4e2cc5343c09742c2c6c151c26da3bcf2
202 Risk Score

Malware Insights

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

The file is a PDF containing multiple suspicious and malicious links, including one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of invisible links and a 'download' lure suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=present+perfect+progressive+tense+exercises+with+answers+pdf In PDF document text
    • https://cdn.sqhk.co/mekurapiw/idVjeti/faradilaperoz.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/icl4K9s/opus_rocket_of_whispers_apk_obb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499999/normal_605b3c3967493.pdfIn PDF document text
    • http://lnstagram-support.live/vuwimofatitupuwaber86yl9.pdfIn PDF document text
    • http://esagafow.fun/process_flow_chart_ppt_template_freei8pnc.pdfIn PDF document text
    • http://spiritstudio.ru/43047654307095qf.pdfIn PDF document text
    • https://cdn.sqhk.co/wadusazilox/zjb6VCs/18828311294.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_601f940677e11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480423/normal_60152446ddecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_6058568273f0d.pdfIn PDF document text
    • http://gratoram.site/what_is_the_play_beauty_and_the_beast_aboutmpxos.pdfIn PDF document text
    • http://babysampler.com/polidedoreg3gl54.pdfIn PDF document text
    • https://cdn.sqhk.co/livulopo/UjbKgjL/vakomo.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/labitajaxatufib/tiwonenogajaso.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/motorola_surfboard_sb6141_blinking_blue_link_light.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/jinuxugu.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/1022472008.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/fulopivakosoxotoganow.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/72063755286.pdfIn PDF document text
    • http://sivinufedumoja.rf.gd/depazilazojagusatodu.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/ezgo_gas_golf_cart_maintenance_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/42061305946.pdfIn PDF document text
    • http://sopozonareje.epizy.com/zamodix.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/debunupagakovi.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_off0000d9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A2 5608 bytes
SHA-256: f6739371bffb8542ec22921e03b1becd0efca82c4dd90191adb019e6deb78b67
font_01_sfnt_off0000ecc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC6 10768 bytes
SHA-256: e9f08d7567020cfece142dc10c56426735dba436b37d3dc4c449e4d9fbfc7baa

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