Malicious PDF — malware analysis report

Static analysis result for SHA-256 69491b98b8c732c1…

MALICIOUS

PDF

92.2 KB Created: 2021-03-09 12:01:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 05c44f51e6fae2f674a1cc1691873f1d SHA-1: 75031def3c7561a12de06f4ce2dcae12908fee96 SHA-256: 69491b98b8c732c1b6493dd1501b2b707dc73e98354196c2250f61b01f22de17
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xajibur.ru/award?keyword=manual+de+alimenta%25C3%25A7%25C3%25A3o+saud%25C3%25A1vel+pdf PDF link annotation
    • http://sifimomikev.sportsontheweb.net/nixasogixunusako.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499979/normal_5fd7ae536dbc2.pdfIn PDF document text
    • http://sovolox.getenjoyment.net/xadikupokijesoriraxuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447251/normal_5fdc0f32e08f9.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://0c2a7d7b-be9d-4ef2-a94c-09ca905cc17d.filesusr.com/ugd/7d21c0_5d631c1f32bd43e195dbd7a0f964f3fc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/3394108331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbd1792e-a939-458a-8dda-ebae22ad9969/58253202623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/291a2e2b-a407-43e5-b528-8913dc057e07/who_actually_wrote_the_bible.pdfIn PDF document text
    • https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_ede226a0eccd403f91c5e81027ead2af.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/64944be2-c89a-4f3f-bdb3-b6216743617c/nalax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc94617c-9688-44dc-bf63-4d562771a403/20106696299.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/ivern_guide_lolking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d6acb44-248d-4fda-8c46-a8ecb4d6a503/vba_excel_tutorial_for_dummies.pdfIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_d33efa3a6afd4e3dac43be148ee471b0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zewimu/ardaas_karaan_punjabi_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/cfius_filing_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b56a4d34-54f8-4709-b5a8-e759432fe9d0/6138768630.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/jilidewivowatij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b26695-a865-43cf-82a0-3fdf8445be71/how_to_reset_maintenance_light_2015_toyota_prius_c.pdfIn PDF document text
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_f27a3665db514a1e927783b48ba53f63.pdf?index=trueIn PDF document text
    • http://jasesazolaf.myartsonline.com/what_is_red_color_personality.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb865a0b-40bf-471c-82e4-b329127caca3/39717971635.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_off0001169d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169D 5772 bytes
SHA-256: 7bd57c3f12e6f92cce2c885bdaae6f340f0cdfbe8fae7db7e7dce72dc1ca7a14
font_01_sfnt_off00012907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12907 14452 bytes
SHA-256: 0ec8e1b1af5596b94a62e635d041509490f751bb2ad321a523bd95137a68fcc9
font_02_sfnt_off00015304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15304 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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