Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b13683b30ef1cb9…

MALICIOUS

PDF

84.0 KB Created: 2021-05-29 21:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bc613556bd8f3d0048b8bcbde461f23e SHA-1: 1045b1c331aaa6eca0078db06a3bece842a4232b SHA-256: 9b13683b30ef1cb930242e76e3cc767ed9d96b1c64c2af51d1aaf8cd72239821
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, appears to be a lure related to a popular movie, likely to trick users into clicking the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/strik?utm_term=transformers+3+movie+hindi+mein PDF link annotation
    • https://zizopozuwugova.weebly.com/uploads/1/3/0/7/130775786/bojerivosimus.pdfIn PDF document text
    • https://tepupusaf.weebly.com/uploads/1/3/4/5/134585026/41cdffe804a.pdfIn PDF document text
    • https://xugowapowafav.weebly.com/uploads/1/3/0/7/130775127/8ad1ed248e3be.pdfIn PDF document text
    • https://vezafowifav.weebly.com/uploads/1/3/1/6/131637603/rozorejelupaki-rusitudas-ziliberowusovid-fovadipafazap.pdfIn PDF document text
    • https://rejowuboxobe.weebly.com/uploads/1/3/2/6/132680789/xemazegiro.pdfIn PDF document text
    • https://kazenatujexisof.weebly.com/uploads/1/3/1/6/131637291/mumig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427519/normal_5fe660593e846.pdfIn PDF document text
    • https://veliwomi.weebly.com/uploads/1/3/5/3/135343105/a8dae4d22585.pdfIn PDF document text
    • https://pafajawu.weebly.com/uploads/1/3/2/6/132682051/xatodiku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5fd829fd644b6.pdfIn PDF document text
    • https://peketavapi.weebly.com/uploads/1/3/4/3/134331612/bunabu-pipabuwurig-pofisofilowuzun.pdfIn PDF document text
    • https://lumevukivejus.weebly.com/uploads/1/3/0/8/130874583/xukamabuzaruseboliv.pdfIn PDF document text
    • https://pevarigemi.weebly.com/uploads/1/3/5/3/135303959/a69cfd7473.pdfIn PDF document text
    • https://padikolejak.weebly.com/uploads/1/3/4/0/134042397/5836977.pdfIn PDF document text
    • https://sivagodumojuji.weebly.com/uploads/1/3/4/2/134235915/4f2609.pdfIn PDF document text
    • https://sikefaliwubu.weebly.com/uploads/1/3/4/3/134375420/torojibowerofa.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/8ca0947f-0d0a-4863-a8a8-dd9399ede1e6/the_pythagorean_theorem_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f78a16aa-dbff-4c82-9804-5949907ed8e3/how_to_find_long_run_average_cost_curve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/025200e5-51c8-4662-9f6a-3a96ca732caa/section_20-1_the_kingdom_protista_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf4cd245-8295-466e-8c32-18710637a25d/mechanical_engineering_salary_in_dubai.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA9 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off0000ff8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8E 5288 bytes
SHA-256: 7540497af627cd1c8b67d50617d629aa937cf36baa40104af6ca49a4a8b5063e
font_02_sfnt_off0001115c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115C 1728 bytes
SHA-256: 0810ce0371bb48a6dbbb6c56d423a1e4bda4455f4638deeed9c91ec23a796c96
font_03_sfnt_off000119f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F4 11200 bytes
SHA-256: 06a9ff19c0ab02e363eb64d9bc37fa6f6eac7e713a21699b0ff7f6a971dccb75

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