Malicious PDF — malware analysis report

Static analysis result for SHA-256 3290319d97d37dde…

MALICIOUS

PDF

78.9 KB Created: 2021-03-04 13:30:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9615fb7228e41b11c99962ec37ffb094 SHA-1: dc0d6d3c66693e5f17bebdeb97cda22862293bd0 SHA-256: 3290319d97d37dde46516b596c24477937fc20786ab5c0dd53d8da5110b885e7
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The primary malicious URL identified is lozipotod.ru, which is likely used to redirect users to further malicious content. No scripts were extracted, but the PDF structure itself is designed to facilitate the distribution of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/strik?utm_term=filipino+reading+comprehension+worksheets+for+grade+2 PDF link annotation
    • http://help-feedback-amzn8.xyz/true_to_the_game_3_book_summaryow7xp.pdfIn PDF document text
    • https://vexepediv.weebly.com/uploads/1/3/4/6/134668456/21e18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_6027cf454c2e4.pdfIn PDF document text
    • http://lnstagaram-verifiedbadges-from.com/37824134151pwaeo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416318/normal_6016118429a95.pdfIn PDF document text
    • https://pufopobumosuv.weebly.com/uploads/1/3/0/7/130776602/8488c6bdca.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/noxanovefaxepo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481064/normal_5fdf38a1b5850.pdfIn PDF document text
    • http://jobware.pro/36372793612b6ytk.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/575989e5-b820-4281-ac9d-a9e0c8c58f1c/59912188513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/523a8ced-715c-4d21-aa72-d4144fb34831/best_price_honda_eu2200i_generator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f06c2e9b-36f8-43cd-922c-79a3ce3eafdd/fizigiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68ca6a7f-65f4-4c19-b9f7-0e19d4fec22e/mepokelijolojewup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7943949e-fa71-477f-b6b0-b448cab3b046/retro_fridge_mini_black.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dcd048d-b38a-4c72-84fc-46119d2810a7/74316117388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1050f99f-428b-47ce-bca5-1bc3b5b1f033/canon_pixma_mx922_driver_for_ipad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67afe243-1863-420d-ade7-67333c2363b7/42548839873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d25527e-21ef-4b93-a771-6d28f0717f8f/mind_power_book_in_hindi_download.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/samsung_scx_4623f_printer_driver_download_for_windows_7_32_bit.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_off0000e922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE922 5600 bytes
SHA-256: a1b696f0327ef2a450797702b563ae1e8a3e227c4a6ecc7bf8fe733e4c17a2c3
font_01_sfnt_off0000fc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC10 10520 bytes
SHA-256: 50da4fd5ac1806a75aa4a998ea61a261a479578232d70975b474ba0971c07bc8
font_02_sfnt_off00011fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176