Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c0fe44f0c9914b…

MALICIOUS

PDF

79.3 KB Created: 2021-04-01 14:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a74892c33dbf9c543762a5fa686a08b0 SHA-1: da81ebbb48a3ab6444b63cc3b409317a3b0aaa10 SHA-256: 00c0fe44f0c9914b07a2124527e4cced26e8c5e6c2c71185d5b604b7645ff86d
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and 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 0.9946

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://baarspo.ru/strik?utm_term=brother+dcp-7065dn+drum+reset+procedure PDF link annotation
    • http://zuberisuxivaki.scienceontheweb.net/welotekoxo.pdfIn PDF document text
    • https://jedopebo.weebly.com/uploads/1/3/4/8/134889916/8043331.pdfIn PDF document text
    • https://lovebaxubifutu.weebly.com/uploads/1/3/4/3/134322000/resufofivi_bujun.pdfIn PDF document text
    • https://burerekubexu.weebly.com/uploads/1/3/1/3/131381452/07c12.pdfIn PDF document text
    • http://jidapuxedepu.medianewsonline.com/metal_cutting_machine_tools_textbook.pdfIn PDF document text
    • https://rokipidofavum.weebly.com/uploads/1/3/4/0/134042790/maxoziva.pdfIn PDF document text
    • http://lafutib.sportsontheweb.net/72864006701.pdfIn PDF document text
    • http://xomapometafa.iblogger.org/89001998970.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/91747153246.pdfIn PDF document text
    • http://jidudilubad.mygamesonline.org/free_checklist_for_building_a_new_house.pdfIn PDF document text
    • https://josojizaxa.weebly.com/uploads/1/3/5/9/135966587/e31867.pdfIn PDF document text
    • http://nawavidosuk.medianewsonline.com/musculo_agonista_antagonista_y_sinergista.pdfIn PDF document text
    • http://rejasikega.scienceontheweb.net/mudos.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://dupepoge.onlinewebshop.net/dajigumisivel.pdfIn PDF document text
    • http://jutatodimat.epizy.com/begefisut.pdfIn PDF document text
    • http://romofimor.onlinewebshop.net/lajuvone.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/47523043370.pdfIn PDF document text
    • http://vulajasazibu.epizy.com/asus_rt-ac68u_vpn_setup.pdfIn PDF document text
    • https://78bdfa25-736e-4945-a764-db21511aacb9.filesusr.com/ugd/9bd82e_f6da568770f44783b5997231b3a3ccd3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xabalaru/telisubogemupafawunos.pdfIn PDF document text
    • http://vuxepogi.atwebpages.com/godazikokoxi.pdfIn PDF document text
    • https://9b704b87-3668-414c-a24e-b30400fe0e33.filesusr.com/ugd/51c472_02a12cdcae574d8b8e34e8771784167a.pdf?index=trueIn PDF document text
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_669dd3af871f4081a37c3646ccfdcd69.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/medscape_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/juwiteruxisamumeru.pdfIn PDF document text
    • http://situbepid.epizy.com/financial_accounting_and_reporting_book_philippines.pdfIn PDF document text
    • http://mirokukuvo.rf.gd/lodilez.pdfIn PDF document text
    • https://c96d0889-97fb-4213-90a4-a08ae01970e6.filesusr.com/ugd/ed32f2_969338a6ccc94dc1a1091dea860abb8a.pdf?index=trueIn PDF document text
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_9a83a8f95065426281cfccaf9b8f45b3.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_off0000e9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DD 5488 bytes
SHA-256: a169a02719bc8766dddd2cbe281fe603e83a02f8318529af299ac445245120b7
font_01_sfnt_off0000fc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC61 10912 bytes
SHA-256: 54a1b4c124e8f09cf5bcd903f43dbd450015d48c7c0d43c8c4ddae905ffa01ac
font_02_sfnt_off0001213c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1213C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176