Malicious PDF — malware analysis report

Static analysis result for SHA-256 b10fccaeefde77a1…

MALICIOUS

PDF

78.0 KB Created: 2021-03-07 05:33:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 13a89958ea5ca326ea066b12d8f10149 SHA-1: 45d043ba19691f9c55c61b7aa6556470b059b71b SHA-256: b10fccaeefde77a180309c210491c79cdd82f8823d9ea6cab5e71c9bcaf09312
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a primary focus on directing users to 'https://maypoin.ru/wix?keyword=real+ps4+account+generator'. This URL, combined with the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM', indicates a phishing or scam attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://maypoin.ru/wix?keyword=real+ps4+account+generator PDF link annotation
    • https://jarofipe.weebly.com/uploads/1/3/1/4/131408229/0c2394b.pdfIn PDF document text
    • http://zuvatewovu.scienceontheweb.net/dimomujixefobivefosi.pdfIn PDF document text
    • http://shlifovka-pol.website/51411518630r1r0k.pdfIn PDF document text
    • https://samivixawudajan.weebly.com/uploads/1/3/4/6/134634686/aa5d1.pdfIn PDF document text
    • http://xivazokib.medianewsonline.com/vitozoxo.pdfIn PDF document text
    • https://cdn.sqhk.co/jatobeguji/doTjg2X/kalemanivogavedepa.pdfIn PDF document text
    • http://lunatan.medianewsonline.com/crown_xls_2000_price.pdfIn PDF document text
    • https://pidowiwosuzaji.weebly.com/uploads/1/3/0/9/130969191/fb8cb75.pdfIn PDF document text
    • http://milanomodaitaly.site/is_ib_acio_conducted_every_year_quoraqljwq.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/define_addition_of_vectors_in_physics.pdfIn PDF document text
    • https://xotonibesil.weebly.com/uploads/1/3/1/4/131407892/jegizenimudarekojer.pdfIn PDF document text
    • http://circulshtangcalip.website/asus_m4a89gtd_pro_usb3_max_memoryqpglh.pdfIn PDF document text
    • https://cdn.sqhk.co/jasamomedam/YMrTJlo/vutaral.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/a6100611-58cf-45dc-a769-0fc830a5e917/weight_of_nordictrack_x22i.pdfIn PDF document text
    • http://fotizojorirepel.onlinewebshop.net/fraud_investigators_salary.pdfIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_a5e3aec94e204cb3a7bcdc90d2a673b3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1b9cfec-dbce-47ac-a757-58fd31d1adf6/hamlet_act_4_scene_2.pdfIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_166a01cd4f214e418b7d4b76113b1ae6.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_off0000f55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55A 5196 bytes
SHA-256: 468913b477b4b17b4469e99c5d602fa0955dbc8e5a554efe66fcc981f0f9bc89
font_01_sfnt_off00010725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10725 10476 bytes
SHA-256: 1cb7c895d4c04d53ceea8b61941318ec71c1951eeb45884c2d4b6255ce362ea1

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