Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbd821660a43f058…

MALICIOUS

PDF

81.1 KB Created: 2021-04-14 05:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 63bf7684478793b7227b09d5d73f14dd SHA-1: 106f2aacddfd4df47d931bbe3b05dc0299525177 SHA-256: dbd821660a43f0586b2cbdb21b6563f92c529a49e8f0dd551b95cdd56b4364b9
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://jottigo.ru/strik?utm_term=video+games+etc+nintendo+switch PDF link annotation
    • https://cdn.sqhk.co/nobutowug/jdoGhf6/pivafekutokunizemunowareb.pdfIn PDF document text
    • http://bumululoru.mywebcommunity.org/jigogidibezawele.pdfIn PDF document text
    • http://tofoxewesaxizuz.mywebcommunity.org/74947526855.pdfIn PDF document text
    • http://duvevonisupobav.22web.org/digi_002_work_with_pro_tools_12.pdfIn PDF document text
    • http://mimoxagevok.22web.org/sobuze.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/gemUShb/kujub.pdfIn PDF document text
    • http://kubodir.22web.org/rupagadivasezofaxareju.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
    • http://dolipefutulej.epizy.com/akshara_song_badhai_ho_badhai.pdfIn PDF document text
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_1c0ddf55f6f947599184af8795fb9354.pdf?index=trueIn PDF document text
    • http://padusij.onlinewebshop.net/derosodi.pdfIn PDF document text
    • http://jipuzekas.rf.gd/how_to_operate_honeywell_whole_house_humidifier.pdfIn PDF document text
    • http://gagarereforer.epizy.com/sokoros.pdfIn PDF document text
    • https://f9fc249e-2e6a-4908-9eb0-88005465a50d.filesusr.com/ugd/2530ee_4cc91ec76ca348708fb306ce0f13ec73.pdf?index=trueIn PDF document text
    • http://poxelisenaxoxig.epizy.com/kivag.pdfIn PDF document text
    • http://tituroxir.rf.gd/hidemyass_vpn_free_trial.pdfIn PDF document text
    • https://8650d040-a33d-467d-a608-6706f181f11b.filesusr.com/ugd/61b8bf_8363faaafbed4dd3bf63848ce72a852c.pdf?index=trueIn PDF document text
    • https://7fd672c9-0ac8-42d3-9d3c-9ebb2fbea2b4.filesusr.com/ugd/92785a_a833f7a171144a52bac9e684ed8c5eac.pdf?index=trueIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_f53a053eee814a1e98efd6bc6c1bef9d.pdf?index=trueIn PDF document text
    • http://nusilemil.epizy.com/36594566421.pdfIn PDF document text
    • http://giwolexuki.rf.gd/certainteed_shingle_warranty_information.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_off0000f2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F1 5072 bytes
SHA-256: d75f90f7cc020e8deb32bc219ed6d5cd97522d2941e4348c87b37bd5a2c2c6d2
font_01_sfnt_off0001041c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041C 10720 bytes
SHA-256: 9f2db411eb1efb5c0c7f3dd5d9abd52cc77fdee37048f011cddab2b0f8f20939
font_02_sfnt_off00012862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12862 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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