Malicious PDF — malware analysis report

Static analysis result for SHA-256 58610295e6adb54c…

MALICIOUS

PDF

77.2 KB Created: 2021-03-28 13:39:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 32cf63bac814183909f518cb6ff68d46 SHA-1: d56403377d348d86987b4c1377a5c5cec2b172fb SHA-256: 58610295e6adb54cdb5a2025139b162813301ce52ca733061e3e5912a20cdbf8
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=engineering+mechanics+statics+hibbeler+solutions+pdf PDF link annotation
    • https://nonaparipito.weebly.com/uploads/1/3/4/2/134265999/ketapoli_duxivazili_gokixuxodo_xopuzibejabibof.pdfIn PDF document text
    • https://gozowejikagigu.weebly.com/uploads/1/3/5/3/135345496/palexixew.pdfIn PDF document text
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/7f6e3fa0.pdfIn PDF document text
    • http://nncucuucuc.space/94991219615nbgcp.pdfIn PDF document text
    • http://trackcreditscore.info/concordancia_exhaustiva_de_la_biblia_strongsfflu.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://uploads.strikinglycdn.com/files/6056fc0b-841c-4f48-bc1b-b7962fb7af9d/86521272585.pdfIn PDF document text
    • https://1801fa0f-56e4-4894-8452-b8e06651d4be.filesusr.com/ugd/868401_fc345403cf3544c6807596bb8449376f.pdf?index=trueIn PDF document text
    • https://bc5ba30c-e427-49eb-abc4-9677f18f04c1.filesusr.com/ugd/bcd086_3bf1da82e8b44886b8d454825723b28f.pdf?index=trueIn PDF document text
    • https://3cd6846c-369c-4875-9c63-132df726a2dd.filesusr.com/ugd/7ab50f_0b51ac2c74444749bc04af5c9c3ce01e.pdf?index=trueIn PDF document text
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_b5352d38a5694688a7884246b4bdf074.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a411161d-5e0b-4fa5-a588-4f76f5042f00/gajemiluwiwumotofinabezaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/232e5d25-a786-4867-b724-802ac441b0db/read_the_bible_from_genesis_to_revelation_in_a_year.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f1b3e1b-dad9-4fe7-a688-beb39a8706be/dinokotisabovu.pdfIn PDF document text
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_8e534063af3e4aa6b7a1f94e1ed67e9d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f30da4-8a27-4c25-91b3-a832432f1909/navazesikisapalamejukugos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a4d522b-1876-4b57-8eed-5a96245a1aab/ladder_safety_training_video.pdfIn PDF document text
    • https://6448a590-b571-4b71-a9e4-820b8531b153.filesusr.com/ugd/782be2_f72305d969234af8b87e5ba7e8062aae.pdf?index=trueIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_1a647143da0e41b781ac70f5f0360879.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/855ca8e0-3314-4f25-9a5b-3490dbaa296b/89073398543.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_off0000e552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE552 5548 bytes
SHA-256: 704f81be469725ea0ea494921e229013ac32fb2162c826ff45fb4b67f2e3ebdd
font_01_sfnt_off0000f7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EF 9752 bytes
SHA-256: 445022cf2072d753d6e4b13e98de259137d53e61e5cdb13ac19b1b3027f00458
font_02_sfnt_off0001193b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1193B 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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