Malicious PDF — malware analysis report

Static analysis result for SHA-256 151c69e7e80bb210…

MALICIOUS

PDF

89.6 KB Created: 2021-03-20 03:49:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c815ad7d76da1ba334fa0a727f37cf4 SHA-1: a376b11c0fb927a5caec1abafcda0be6350299c7 SHA-256: 151c69e7e80bb210d1f22d10d86e67ff29caecb2c56143fd55a4107531f092ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. ClamAV and ML classifiers strongly indicate maliciousness, specifically flagging it as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs suggest exploitation or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=activity+5.1+calculating+properties+of+shapes+pltw
    • https://cdn-cms.f-static.net/uploads/4407724/normal_6015cc2ed5ece.pdf
    • https://cdn.sqhk.co/livisade/dyieeie/diy_oil_painting_paint_by_numbers_kit.pdf
    • https://cdn-cms.f-static.net/uploads/4479237/normal_5fd8154bc7be2.pdf
    • https://cdn.sqhk.co/bimolixumotu/hiicjcw/business_analysis_techniques_book.pdf
    • https://cdn.sqhk.co/tamaladafa/eYJiige/north_star_academy_hockey.pdf
    • https://cdn.sqhk.co/pujalabasi/jigcNhd/64507583824.pdf
    • https://cdn-cms.f-static.net/uploads/4477635/normal_604fe8f33242f.pdf
    • https://cdn-cms.f-static.net/uploads/4421218/normal_601b4ee36ca8b.pdf
    • https://cdn.sqhk.co/mosugukasiba/32FUDwQ/barbeque_near_me_open.pdf
    • https://cdn.sqhk.co/mivezifov/gid1rJZ/92749620892.pdf
    • https://cdn.sqhk.co/jowapezo/pxhggcN/android_tutorial_video_free.pdf
    • https://cdn.sqhk.co/bilanogakiw/fnsgjhf/calligraphy_font_free_for_mac.pdf
    • https://static.s123-cdn-static.com/uploads/4420911/normal_5fec4b8d31a1a.pdf
    • https://cdn.sqhk.co/zadoweferoxe/fYX8UoV/asgard_s_wrath_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b81cab93-0448-43f8-bea8-ed26daeea320/jinujujagozokuxuviriro.pdf
    • https://uploads.strikinglycdn.com/files/73c6d0c4-2b19-401c-b6ed-48f5d2d4166d/jonijawojusa.pdf
    • https://f2f8a3c9-3ea7-4a25-b7e2-3e2749f32899.filesusr.com/ugd/f0e51d_f273c15dfe694f49ba5b448639b91a10.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6f81e90a-99fc-41d2-af69-67f19e21a8d4/2003_volkswagen_jetta_transmission_fluid_type.pdf
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_66e0e1161f534b7da3d497b72d228a06.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5cc8e837-ff99-418b-93db-e4ecf92bce25/vemiwode.pdf
    • https://uploads.strikinglycdn.com/files/70b3d172-2926-4233-9224-75f1d1b5d8c1/gisuxevujusekemi.pdf
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_94cba55fa6dc4e1fa29fa34a15bf44f6.pdf?index=true
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_461d6d8579664fa180baf56ac55dc853.pdf?index=true
    • https://ff4d9611-e7ea-45f2-85d3-f0b464ef817f.filesusr.com/ugd/48f461_1e90e932c897489294a008d9616babaa.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011de5.bin
d165004059c720ae4a2d83e40e1593b54cd426887aa537d1b3ea5b97df1f4787		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE5 5728 bytes
font_01_sfnt_off0001319e.bin
d420e13a4dc9cc7b9cd2411d8565279e6a4bc473ec8bbd9025f307faf5680514		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1319E 11580 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.