Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c8b25e9863cf49…

MALICIOUS

PDF

70.1 KB Created: 2021-03-05 06:16:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 08105a2dbe5ab46280e4feffd78195d2 SHA-1: 70e4afc4194d3c291b83d9429c7e4696159c0c33 SHA-256: 58c8b25e9863cf49485e647a2a8a24cf8e19b7f757c7cf009b0fb4b8cebb74a2
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document, possibly leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/wb?keyword=easy%20piano%20songs%20sheet%20music%20youtube PDF link annotation
    • http://trynutra.shop/mowogajijif4j4ui.pdfIn PDF document text
    • http://e-devletodeme.net/brand_image_definition_simplemx5c3.pdfIn PDF document text
    • https://cdn.sqhk.co/kisasizaro/djeQjgT/zonanopives.pdfIn PDF document text
    • http://wdd13.ru/muzisanojoxufunaag29.pdfIn PDF document text
    • https://cdn.sqhk.co/wobivada/0ijchkk/asphalt_8_hack_no_root_apk.pdfIn PDF document text
    • http://sberin.xyz/6228207964uanu3.pdfIn PDF document text
    • http://thiswaytovogue.com/small_group_guided_tours_japanfq28p.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/mesure_de_masse_cm2_evaluationrqrqr.pdfIn PDF document text
    • http://velavedi.iblogger.org/rescinded_job_offer_letter_template.pdfIn PDF document text
    • https://cdn.sqhk.co/jumivosokigo/jhij8KF/numeluxiju.pdfIn PDF document text
    • https://cdn.sqhk.co/revujinarewu/cgchbw7/24709159563.pdfIn PDF document text
    • http://xiletunekukine.iblogger.org/jumukolesojiz.pdfIn PDF document text
    • http://raicen.com/electronic_health_records_policies_and_proceduresgj0ky.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tepusijanakigat.epizy.com/vaxovesibonal.pdfIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_5118e60fed064870a81ecd3636ebd3cd.pdf?index=trueIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_2b8ffb5b717348fe9ee5485d3c4c10ba.pdf?index=trueIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_ddc7d44515674f1f9ae6c0cabc2078e0.pdf?index=trueIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_41e56daaf1324611b1c90cbd28059b64.pdf?index=trueIn PDF document text
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_8ec695f09de143d5b6a38707d8c9a70d.pdf?index=trueIn PDF document text
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_110da111090840a781c16b4f208de01b.pdf?index=trueIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_5259ababee344281a089dbf1ff1f595c.pdf?index=trueIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_63c375eabdb44ba1b5de2b52179f57a9.pdf?index=trueIn PDF document text
    • http://bebinuvejaxate.rf.gd/camstudio_apk_for_pc.pdfIn PDF document text
    • http://jelazib.epizy.com/bhaag_milkha_bhaag_movie_300mb_khatrimaza.pdfIn PDF document text
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_abb32e81264c49e4b1f0b0bce45fbe35.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EA 5416 bytes
SHA-256: 0880c0c21278cf60a2ccc10126c50022e5d4ebaad3da504d9cf1bd36df998464
font_01_sfnt_off0000e63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63F 10148 bytes
SHA-256: aee5bef6d93f1f5e1b1c2820f61647a92a7983068d39a06a52a77c673094b377

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