Malicious PDF — malware analysis report

Static analysis result for SHA-256 16ecda64e046a56e…

MALICIOUS

PDF

75.1 KB Created: 2021-04-10 00:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bbcdfa476faa5d6d513498ab85850dae SHA-1: 8f95a4896ca0758983b1cda1e68940d758a34532 SHA-256: 16ecda64e046a56e7453d1e0106f6a80659194bf64fb8b8eab657696576fd33b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/strik?utm_term=vinylmaster+pro+crack+download PDF link annotation
    • http://bupro.asia/murudopikumamawukujl8t7n.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/ibgdhbP/22443312059.pdfIn PDF document text
    • http://modalidetefid.iblogger.org/bc_speculation_tax_authorization_form.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/jijiicS/break_wall_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/jShchj5/i_will_provide_the_answer_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/penavagalo/hWIQjhP/command_form_spanish_tu.pdfIn PDF document text
    • http://grinallex.shop/812763984842piel.pdfIn PDF document text
    • http://lg-copyright.com/zozogokeweturaruzebasa7anex.pdfIn PDF document text
    • https://cdn.sqhk.co/pazoxini/e1ggJx6/letsencrypt_wildcard_renew_manual.pdfIn PDF document text
    • http://bestrongbyg.com/space_ship_clip_art_drawing6e4so.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ace8f101-56dc-4768-9fa1-c3793f3f9feb/nikapomekiwubeketu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb21e65-7a99-4b1b-a149-82818155bcbc/significado_72_nombres_de_dios_para_imprimir.pdfIn PDF document text
    • http://sokagozu.rf.gd/dow_jones_jobs_report.pdfIn PDF document text
    • https://3abcc933-4059-444f-8e65-7077e95f005f.filesusr.com/ugd/44645f_80cc677648f74d1da42811c9475bbc70.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4165543-158a-497e-9699-3e085819e90b/87571652996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b1217fa-567c-427b-a678-e46a87a8a650/why_is_my_kitchenaid_fridge_beeping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34411fa2-e3bd-45a2-b6ea-5f869f3ff4db/motorola_moto_360_2nd_gen_review.pdfIn PDF document text
    • http://wagumujukux.epizy.com/7313133768.pdfIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_4525bf57d64c4cfb88bbb4660a82938e.pdf?index=trueIn PDF document text
    • http://potunivezu.epizy.com/channels_of_communication_in_an_organization.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9adb68fb-0d79-4cb8-b18b-edaa5cfe3d18/73230182827.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE82 5440 bytes
SHA-256: 9b48029a74f1214cfbba951e08043146bcb108d64dcb371492e5c256dc7d2476
font_01_sfnt_off0000e101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE101 10724 bytes
SHA-256: b4819aa33f6689d25a0f2ea993d8a2c011bb810bdb2721eb1957d0438b0b1e64
font_02_sfnt_off000105d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D4 16708 bytes
SHA-256: baf9e79b99a6c5ce309303f100e13512865f605838d3982d4459a6e99b715e09

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