Malicious PDF — malware analysis report

Static analysis result for SHA-256 14826085789a8e20…

MALICIOUS

PDF

83.3 KB Created: 2021-05-16 06:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2ec9fd8b9a78b4b6d58eef111a4a1fd6 SHA-1: 22e35db13b8e3bae3ea6ac56770df6524e0f43e4 SHA-256: 14826085789a8e2022a09c07e74dee7b57e776d9fc10cc00b2f1d6b215011175
136 Risk Score

Malware Insights

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

The PDF file contains a high-severity heuristic indicating it's a phishing lure that redirects to an external URL. The ML classifier and ClamAV also flagged this file as malicious. The embedded URL, https://xajibur.ru/strik?utm_term=how+much+do+companies+spend+on+safety, is the primary IOC, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://xajibur.ru/strik?utm_term=how+much+do+companies+spend+on+safety PDF link annotation
    • https://xuwowazasoko.weebly.com/uploads/1/3/4/0/134041707/06617c1a02f2665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497082/normal_602a333b53c56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_60451121c3840.pdfIn PDF document text
    • http://lapebev.iblogger.org/doxoseg.pdfIn PDF document text
    • https://gowajepev.weebly.com/uploads/1/3/4/9/134900038/potawajukodi.pdfIn PDF document text
    • http://wevoselaxoto.66ghz.com/zufiworibudomoxer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464525/normal_601df8b64d913.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445107/normal_602aecb6b5859.pdfIn PDF document text
    • http://kuwofadenokul.iblogger.org/malaxitalisimusaroda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486994/normal_5fec2334d357e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417129/normal_602e373f55086.pdfIn PDF document text
    • https://xovotirepotu.weebly.com/uploads/1/3/1/4/131412955/busil_kofekepesexip_mikabu.pdfIn PDF document text
    • https://sivisobimiji.weebly.com/uploads/1/3/4/7/134754783/sodenodemofe_korofapafa.pdfIn PDF document text
    • https://lagepelod.weebly.com/uploads/1/3/4/7/134716456/jojupisap_tafukag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fizaxo/opportunity_analysis_canvas_third_edition.pdfIn PDF document text
    • http://vimonaker.epizy.com/field_view_care_home_cqc_report.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/gedowavuxazimoziwes.pdfIn PDF document text
    • http://netifikapiwi.epizy.com/tinumij.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/77526660117.pdfIn PDF document text
    • http://davagutuvis.rf.gd/womuxopano.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/story_elements_worksheet_7th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/23205403130.pdfIn PDF document text
    • http://raduniti.epizy.com/presonus_fp10_firewire_audio_interface.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF615 5304 bytes
SHA-256: b11cc967025fa9e7011b4e89f68d31d02ab1b062ef11498dfa3c1a97374b3706
font_01_sfnt_off0001080f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080F 12016 bytes
SHA-256: 0d7bd14fdc7de208d6a2cafd80802e5945a3c31e72ef035281a8f5bb4ae736dd
font_02_sfnt_off000130f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F9 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c