Malicious PDF — malware analysis report

Static analysis result for SHA-256 22382491bbeecf91…

MALICIOUS

PDF

75.1 KB Created: 2021-03-22 15:51:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 187435079f9dd2cdd5e61e37777f2f2e SHA-1: c2546ff70cbf831f9af80d8f1dec4468765182b4 SHA-256: 22382491bbeecf91368463e4700db6c06b57df38b6f5d0a0d3ffbd2254aa4a6b
136 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically designed to redirect users to a malicious website. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URL, https://botokaw.ru/award?keyword=brutus+1+pdf, is identified as a redirector for free-download phishing, suggesting an attempt to trick users into visiting a site that may lead to credential theft or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/award?keyword=brutus+1+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384152/normal_5fdb3a5912efe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459478/normal_6004d40021c3f.pdfIn PDF document text
    • http://ravigimojamel.mypressonline.com/autocad_save_black_and_white.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/suvipamid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474998/normal_5fe5ed735f908.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/xazarujokemus/89093499821.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/860aa9b3-a7f7-4400-9f3b-3e68a0194070/honeywell_quietset_tower_fan_-_hyf290e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe1a21b-831b-4c20-b1fc-a10558af5782/muteri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de8870a3-a51d-4d78-9a53-8a242eb18740/canon_speedlite_430ex_ii_flash_review.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/xufuxigoxularulepozapes.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/gellibrand_river_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/pioneer_avh-p4100dvd_bluetooth_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73884534-7376-4e2c-96b8-c26311f4427e/65734615887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35200480-4941-4f78-ab7e-f8844e50bb4a/18931302193.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/adobe_reader_software_free_softonic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb65a8d1-c750-4ebf-8b20-26e3a48408fa/honda_izy_carb_gasket_kit_gcv135_gcv160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2fe32ae-5b6c-40e1-b5e0-ad8b6fe1c814/wifoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20b907fd-5b4b-4416-88c1-71e82183643b/69903127409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/208c9cc3-18cd-4370-b8c7-f8e939049656/modern_biology_textbook_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6210842-c7ce-4631-96d7-9f37bbbf5e16/zexorivirexakegowon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a503711-1754-4cb9-93d4-fdb5e49abe4d/35655342647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72cf0db2-949f-400d-aa56-db9064d01ba1/wemenotivogozari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b34be320-f788-48cd-8e1d-c35a71484d05/animal_farm_clover_quotes_with_page_numbers.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_off0000e9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EC 4896 bytes
SHA-256: e1ea593a62a2eaa3b4c67d4c9c9475a94a57059fb0f37feb2f14acc11e3a8a4b
font_01_sfnt_off0000faab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAB 10848 bytes
SHA-256: 9184758065246f2775cbbad8b770522e30af3e73751b5f5db730d6297dccd32b