Malicious PDF — malware analysis report

Static analysis result for SHA-256 a191d5ba0afe6e0a…

MALICIOUS

PDF

79.1 KB Created: 2021-05-19 12:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c8636e2e595bdd4f76ff88f611de31a8 SHA-1: c379297c8256eb036f85d3e2d11f8d1ea9e95e47 SHA-256: a191d5ba0afe6e0aebc9bb04589b920e5416bf06b6c678f0610ee8e5b3bba4f1
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The document body, though partially corrupted, suggests a lure related to pregnancy health. The primary indicator is the embedded URL which redirects to a known malicious domain, likely for phishing purposes.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://druttle.ru/strik?utm_term=how+to+cover+iron+deficiency+in+pregnancy PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448986/normal_5fc82d5db7c3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459177/normal_604ad03aef85d.pdfIn PDF document text
    • https://mawebexakonu.weebly.com/uploads/1/3/4/3/134390129/4409689.pdfIn PDF document text
    • https://garujidizog.weebly.com/uploads/1/3/1/3/131398488/zedazizelo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413369/normal_600d5cbf7a3f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455180/normal_5ff47099b3a28.pdfIn PDF document text
    • https://vazonani.weebly.com/uploads/1/3/1/8/131871537/feguvijoparal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480594/normal_605f7e76de2fa.pdfIn PDF document text
    • https://bipixexomalexu.weebly.com/uploads/1/3/4/3/134349320/vegamegim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493195/normal_5ffaa967a5aba.pdfIn PDF document text
    • https://wutodifutatur.weebly.com/uploads/1/3/2/8/132814097/ropobox_zibikufijak_zusamirat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470698/normal_6048e5829ff1b.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/tuxenipup/64274311729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47f606e8-2348-49ef-bc57-1f3f5966dffa/schumacher_battery_maintainer_sc1299.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/electrical_engineering_jobs_salary_per_month.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d55d909-6ce5-4e89-bda2-d4b653dbaa65/68171332817.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/numeracy_skills_test_practice_login.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/how_do_i_download_google_maps_on_my_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9d45fad-ba24-49b4-9cfb-6a320c2e5582/stephanie_buttermore_home_workout.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/general_motors_company_annual_report_2016.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_off0000f66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66A 5328 bytes
SHA-256: 3af98b869f14567ec44a286b4077b81a8d71a884e0762939adde86e93fa1686e
font_01_sfnt_off000108bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BD 10620 bytes
SHA-256: 39ed702a5b9ff4abcbba9e5dbe520693f322b5fc3c8b115dfe35372b81419127

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