Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a64270872e84d2…

MALICIOUS

PDF

88.2 KB Created: 2021-04-05 04:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 70a9b47b116cd687aaa376e8d102c72d SHA-1: c922776c38b06e21249d42c9c3bd6aa284fe9ebc SHA-256: c0a64270872e84d2e91be3590136790b0af3c05251564175746669bc9d16ca76
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ClamAV detection (Pdf.Phishing.Trojan-d2568dad23a94d95) and an ML classifier. It contains an embedded URI pointing to a suspicious domain, 'midufefew.ru', which is likely used to host phishing content or a secondary payload. The document body, though heavily obfuscated, contains strings that suggest a lure related to 'Family Feud'. Several other unknown reputation URLs were also extracted, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/strik?utm_term=family+feud+questions+funniest PDF link annotation
    • http://hookup673.site/gexetidutudidajijilivefojju0kp.pdfIn PDF document text
    • http://qupieasy.online/23953945426b34q1.pdfIn PDF document text
    • http://todayshop.website/qu_significa_estado_de_emergencia_sanitaria0ck8d.pdfIn PDF document text
    • http://musofiron.ru/90747023617r4a6c.pdfIn PDF document text
    • http://newsportstechnology.ru/1386971477ym80m.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/nigimul/tmux_cheat_sheet_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/74858939090.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/are_samsung_remotes_ir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/406bf9bf-1940-46a8-9804-ea8eba64f349/bufadukalafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afab366d-90e4-4cbb-b2e6-d61675ed5f86/jesumujoropomoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/331f4b0e-9d19-46c8-a6c7-525f6301b35e/depimowamonomuzorazuzov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4360b5db-47f2-4f56-8324-df8634e0a80f/29979851771.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/freebsd_handbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1236185-5832-42c3-8dec-80979b256caa/wuporufogom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9cc36d7-54ad-4e5a-9651-4e8e64d1861e/crazy_love_movie_2007.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/6538948576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/984c513c-43f4-49fb-a431-fe03d6c4b1bc/11692685087.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/48957540946.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/fonewujijumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eed88f3-755d-4e48-96e9-0d201a46526f/lasko_5586_digital_ceramic_tower_heater_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1e63d16-6934-41b1-9c60-255843433bf8/pixidenoxizaruxe.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/63133561942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5652de4e-0907-4b9d-a9ef-59df9f3ceacc/what_are_the_elements_of_security_architecture.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5E 5020 bytes
SHA-256: d002b9a297f1b9d51a375913ee49ab3705a562b354d90c2ba7c3c368d5dc4c1e
font_01_sfnt_off0000fc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC61 2528 bytes
SHA-256: fc4021e369c7333a3e2698b65512cd5ca33aa0a3949f6c925ad90d66ca89f0ce
font_02_sfnt_off00010792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10792 10956 bytes
SHA-256: b9548a256c7a2d26ce53c2e3cf9606e474b1912124c82d0fbee3d02cddaffd5a
font_03_sfnt_off00012cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CFE 17180 bytes
SHA-256: cb4a458fceb2a0687ddcbab9b79aef88c6e7e93249c26af8d4b197dbee6bfd06
font_04_sfnt_off00014441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14441 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176