Malicious PDF — malware analysis report

Static analysis result for SHA-256 59bf137c31000762…

MALICIOUS

PDF

76.3 KB Created: 2021-03-20 10:59:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: dbbecfdbf78dac797e1715d425d910be SHA-1: d7b62e58775e689e150b61c4c053b569dd1536b8 SHA-256: 59bf137c31000762facd699239df0602301e65788b11844075e7b2ca4f69051a
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external URIs pointing to disposable hosting and link farms, suggesting a phishing or SEO spam campaign. The presence of embedded URLs and the nature of the heuristics indicate an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/wix?keyword=zecharia+sitchin+pdf+ita+gratis PDF link annotation
    • https://gotukedefiwukub.weebly.com/uploads/1/3/5/3/135309477/vezemared.pdfIn PDF document text
    • http://fasad-dom.site/77959488759sx0mv.pdfIn PDF document text
    • http://lifegirls.site/70006199162ox7n6.pdfIn PDF document text
    • http://xenuven.22web.org/butunobob.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/rowadorizonanob.pdfIn PDF document text
    • http://xazonojader.mywebcommunity.org/11177999006.pdfIn PDF document text
    • http://vekvelo.ru/emergency_radio_frequency_list397th.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/78148695176.pdfIn PDF document text
    • http://ramidavukul.medianewsonline.com/brian_tracy_no_excuses_download.pdfIn PDF document text
    • https://temavemata.weebly.com/uploads/1/3/4/6/134611183/wudoredemuwamuma.pdfIn PDF document text
    • http://potawuzaj.medianewsonline.com/rudetef.pdfIn PDF document text
    • http://kifopelidito.mypressonline.com/it_associate_salary_state_of_california.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/cryer_international_criminal_law.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://laxufazekez.atwebpages.com/el_camino_del_artista_descargar_gratis.pdfIn PDF document text
    • http://neketepa.myartsonline.com/fernando_pessoa_poesia.pdfIn PDF document text
    • http://weferobiditikun.epizy.com/are_burpees_good_for_burning_fat.pdfIn PDF document text
    • http://zemigubu.epizy.com/power_care_pressure_washer_extension_wand_manual.pdfIn PDF document text
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_24dadfa1180f4587985bb101d91b8be8.pdf?index=trueIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_39b28d45459246dbb7d4a8d0f8169209.pdf?index=trueIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_f2366b2e57e9434781fb142aad7a7158.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2C 5020 bytes
SHA-256: e49ef4c0436a5e76a1c00fa32cc7f658192d6d4cb5b94a52d509957c96644361
font_01_sfnt_off0000ec36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC36 13208 bytes
SHA-256: f1edb9ca6e087dc7fe0b731ce7b293b9dfc848cd3cabb37d35a6263212192445
font_02_sfnt_off00011457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11457 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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