Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aca8fc4f76b51a6…

MALICIOUS

PDF

88.5 KB Created: 2021-03-24 18:20:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 07ae3eec8425554a48d7480ad922553b SHA-1: b38137d04a10f006ebfe2f01dbc895dfc95e0739 SHA-256: 9aca8fc4f76b51a6522c921d9140729439dc2cded4717840ac70b3cadacb3026
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://pelibifir.ru/strik?utm_term=cbse+class+3+maths+book+syllabus PDF link annotation
    • http://gepanukotex.getenjoyment.net/pdf_bearing_catalogue_skf.pdfIn PDF document text
    • http://it50life.pro/guided_access_ipad_forgot_passwordzol3t.pdfIn PDF document text
    • http://fruitnaturs.space/celestine_donkor_good_to_me_audio534z5.pdfIn PDF document text
    • http://fijubigatusurov.scienceontheweb.net/71720819732.pdfIn PDF document text
    • http://noxaduva.mypressonline.com/applications_of_twisted_pair_cable.pdfIn PDF document text
    • https://xuxuratedagofat.weebly.com/uploads/1/3/4/6/134644764/wunugofivexu.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/prognosis_filariasis.pdfIn PDF document text
    • http://sunmarkt.ru/24660728766hzm5i.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/kegikifelisuxeretol.pdfIn PDF document text
    • https://wobafelu.weebly.com/uploads/1/3/4/6/134613510/5208834.pdfIn PDF document text
    • http://supportcopyright.net/33544832571q50dz.pdfIn PDF document text
    • http://vomidujoma.scienceontheweb.net/gipuzokika.pdfIn PDF document text
    • https://jarufepijup.weebly.com/uploads/1/3/0/7/130776730/nilonijivale.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/urine_cytology.pdfIn PDF document text
    • http://rijoginijamibeg.mypressonline.com/bitegupovugeporujiba.pdfIn PDF document text
    • https://zapineri.weebly.com/uploads/1/3/4/7/134707132/2216a0c.pdfIn PDF document text
    • http://foxilajat.sportsontheweb.net/14976158464.pdfIn PDF document text
    • http://ruwazumusef.scienceontheweb.net/acta_de_constitucin_del_proyecto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/f710cb7d-89eb-4a98-8e22-e78ba7c98bf4/62561549188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7a7415a-d6e6-47bb-aa9c-0c50e2aa1411/tojosukafopapogiweme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0168db1-3ac6-4141-b229-66b4bb5a7b2c/how_do_you_reset_the_ice_maker_on_a_samsung_refrigerator.pdfIn PDF document text
    • http://tiruweditivunaw.myartsonline.com/nuzavoxafogobuluvesebaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79bc8aa6-4ac1-4859-9a01-cb9e9d7c7d39/pezemoritubo.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/88740189434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ccce2ed-9181-4983-bb57-b79088d1a161/najurupobijozazebufafivow.pdfIn PDF document text
    • http://riledabetime.myartsonline.com/apostila_curso_de_ingles_gratis.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_off0000fe2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2C 5316 bytes
SHA-256: 848c69cf61a7f8f235b14eb7edf6b33aad17f34632aa50908819cd8acd93a3e7
font_01_sfnt_off00011021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11021 11168 bytes
SHA-256: bd19531c51c43162e32bd4f6c9d206752fe479f941048ccd6e1088769273076a
font_02_sfnt_off0001366a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1366A 9220 bytes
SHA-256: 9ed142b999b37e8c4907873fb1375becd688232fe68607254476a709c88b40e9