Malicious PDF — malware analysis report

Static analysis result for SHA-256 18010ca2f8d1eb2b…

MALICIOUS

PDF

116.0 KB Created: 2021-03-25 09:09:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 79a1e4c4af84d98ab3227587b4ccfdea SHA-1: 5a0eb0c759d87ba7f5042d1a1831610c0469bd2e SHA-256: 18010ca2f8d1eb2b54904745328118e7b8454cd5562c87a932e9476b9bebb5f3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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://bologen.ru/123?utm_term=bangla+bangladeshi+ghazal PDF link annotation
    • https://tewifevorifoja.weebly.com/uploads/1/3/4/3/134387655/fukosipela.pdfIn PDF document text
    • http://legalvictory.group/lejolisepetaxipuwobh83f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412890/normal_60008ea44bb5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_5fd34070adec4.pdfIn PDF document text
    • http://raisinshub.club/84996781741ditgh.pdfIn PDF document text
    • https://megeleju.weebly.com/uploads/1/3/4/3/134319984/rifepezuxawadirazun.pdfIn PDF document text
    • http://onlinetiser.website/how_to_set_call_forwarding_on_avaya_phone6jhcz.pdfIn PDF document text
    • http://heymama.store/free_bismillah_khan_sanai_musicjrfse.pdfIn PDF document text
    • http://mebets.xyz/how_to_make_face_mask_with_dartsdr384.pdfIn PDF document text
    • https://duxegolukazokun.weebly.com/uploads/1/3/1/3/131398215/maguwadalu-gusivadisozap-nuxowo-kotik.pdfIn PDF document text
    • http://xajavawinereko.mywebcommunity.org/nararobalewesubifuguxeb.pdfIn PDF document text
    • http://vavexefane.mypressonline.com/how_to_become_an_aircraft_maintenance_engineer_in_india.pdfIn PDF document text
    • http://drenajkrasnodar.ru/57449031779gzbwb.pdfIn PDF document text
    • https://vuzamijeletux.weebly.com/uploads/1/3/4/6/134652655/wanumikinamura_gorugabidasoz_piwigumozi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496592/normal_5fda5e5b4786a.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/ruxisib.pdfIn PDF document text
    • http://world-wildshop.com/74046971265953qr.pdfIn PDF document text
    • http://kejumazinanu.mywebcommunity.org/samuel_arcanjo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453743/normal_603d2ddd49765.pdfIn PDF document text
    • http://kyukty68.xyz/xbox_one_controller_bluetooth_adapter_pcpg2jp.pdfIn PDF document text
    • http://findssldz.xyz/70919376424pwhum.pdfIn PDF document text
    • http://rrrrkkkkk.space/45114170335v6vrt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://wovuluvoju.onlinewebshop.net/the_neophyte_s_guide_to_scala.pdfIn PDF document text
    • http://xefiposokupama.myartsonline.com/converting_to_word_document_free_software.pdfIn PDF document text
    • http://zutaturusix.myartsonline.com/pipojapelinelimuzo.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001489e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1489E 5232 bytes
SHA-256: b6e7e0b775df89ff7d72133af870e2f77687e35386d36e26d88677957faf733f
font_01_sfnt_off00015a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A66 4228 bytes
SHA-256: d194cecfa8f871a1cb8f359544f2624861249456c4ec65d55d1a5cc47ac84a6a
font_02_sfnt_off000167d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167D8 4068 bytes
SHA-256: f145b9b71756c3c5b786c09f817e32235252bf072fe6451ddfcaf5f94f45d13a
font_03_sfnt_off00017471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17471 13940 bytes
SHA-256: 4114b8d8ec1461fbff5279f2c9c75f250bc83a694b7ea169d32f451142c1376b
font_04_sfnt_off00019f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F9C 16444 bytes
SHA-256: 98638bf045e3cc12b9023cb0b35379c9b7b286218f3ee4d7857af1c41496ca7e
font_05_sfnt_off0001b644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B644 2600 bytes
SHA-256: e716adf17f5007c7dfca666ebfdb7c8e568ab3ce113d5556335512ffa9fe2e4e