Malicious PDF — malware analysis report

Static analysis result for SHA-256 41492aa3799a6ca0…

MALICIOUS

PDF

91.9 KB Created: 2021-03-21 05:54:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c61a07e6860e80712efabe1e0ee88ad3 SHA-1: 2bdd426d5d1a1bda14abc597f477f305006222fc SHA-256: 41492aa3799a6ca0e66926fe6f7d5199c49cf5433cc05266133a69370d109438
194 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including ClamAV and an ML classifier, and contains a large number of external links, many hosted on disposable domains. The document body suggests a lure related to "Wagner airless paint sprayer tip sizes", likely intended to trick users into clicking on the embedded malicious links. The presence of numerous external links and disposable hosting indicates a link farm or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=wagner+airless+paint+sprayer+tip+sizes PDF link annotation
    • http://winoorama.space/what_is_a_short_communication5u4ed.pdfIn PDF document text
    • http://setopin.mypressonline.com/94476436217.pdfIn PDF document text
    • http://profaudit32.ru/intermediate_algebra_college_booki6dl9.pdfIn PDF document text
    • http://nemugub.mywebcommunity.org/gozenuzuxinav.pdfIn PDF document text
    • http://smirno.life/jazz_music_trumpet_sheet_musicfxgni.pdfIn PDF document text
    • http://monufovaxuj.66ghz.com/adding_subtracting_multiplying_decimals_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dadinubu.rf.gd/el_poder_del_kabbalah_gratis.pdfIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_b3a18c90684848bb985cf4c64a8ceeff.pdf?index=trueIn PDF document text
    • http://safatagikev.rf.gd/54892713627.pdfIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_07a1c41aec0a42a49bd3abdb62fe1761.pdf?index=trueIn PDF document text
    • http://mofomunor.rf.gd/dujidimerejixani.pdfIn PDF document text
    • http://fudewisukot.rf.gd/assessing_reading_alderson.pdfIn PDF document text
    • https://6e3eaeb2-b9dd-4462-8b56-96c59beebd9a.filesusr.com/ugd/dcc11b_a37e62481e7e40f3885ae267280e3de2.pdf?index=trueIn PDF document text
    • https://6d23287f-a15b-43b7-8d69-700c0e01f504.filesusr.com/ugd/185c00_7ec0f8b4227e45c4995dde4b3df5dcd5.pdf?index=trueIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_86454983dfca4588b38140a0e677400d.pdf?index=trueIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_6ddf3957e8c84eb1b0688ba69bf57b9e.pdf?index=trueIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_746af656c2fa4e06a63481af2edab230.pdf?index=trueIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_b3bfce29321c499eb675fe2bc46b19bf.pdf?index=trueIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_3e976dfa5c1e4fd6bf801137cb5ef5da.pdf?index=trueIn PDF document text
    • http://lodumojokexiku.onlinewebshop.net/how_to_create_a_wordle_in_google.pdfIn PDF document text
    • http://xirofapinowud.atwebpages.com/lineman_and_cableman_handbook_13th_edition_free_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12841 5152 bytes
SHA-256: e8591dfe1b97ffe78a4046ee002b71dce0de344a559713f14a5a899a1a24e685
font_01_sfnt_off000139f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F8 11292 bytes
SHA-256: 844c3b1c053550faebe3930b2b29c4daec39e6f2d6a2f8b298665e80476f68a6