Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1fe94b23c292054…

MALICIOUS

PDF

90.3 KB Created: 2021-04-17 15:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c0b3a9acfb320c7a3ed253ee5f40b2f0 SHA-1: 24bee1b16f05e451e40af624fa87f1d0ff201379 SHA-256: e1fe94b23c2920541f968038a5530915048c21744d9665c9e208a16547597af7
166 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, employing a link farm on disposable hosting to disguise its malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs users to open a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious content, likely a trojan or phishing payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://midufefew.ru/strik?utm_term=is+there+any+open+world+in+ff7+remake PDF link annotation
    • https://tufafoselebore.weebly.com/uploads/1/3/5/3/135389740/787402.pdfIn PDF document text
    • https://delazodudiz.weebly.com/uploads/1/3/4/5/134591817/jugejuvitirirunerovu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412607/normal_603d40863e11e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_60648823d5039.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464996/normal_5fffa1dfec30a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465250/normal_6019ac2d98659.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/merukubekapujokunoveg.pdfIn PDF document text
    • https://kesiwupi.weebly.com/uploads/1/3/1/4/131407351/xubomemalukitamefama.pdfIn PDF document text
    • https://pesosetolumejaw.weebly.com/uploads/1/3/6/0/136094132/jopusubakuzowak-satage-pisebire-wofetura.pdfIn PDF document text
    • https://tojemiwavujiguv.weebly.com/uploads/1/3/4/4/134468879/lebowomurozomoxufuv.pdfIn PDF document text
    • http://boxidodo.22web.org/3049273497.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xejobutek.onlinewebshop.net/arcana_chronicles_book_3.pdfIn PDF document text
    • http://nodikaduf.onlinewebshop.net/berger_paints_price_list_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47e937d2-897b-4c9b-98a4-0a97906e4011/84922415377.pdfIn PDF document text
    • http://jizipok.rf.gd/62223978104.pdfIn PDF document text
    • http://wovibojo.onlinewebshop.net/raruzexud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d317e7e8-7123-4b17-af77-b652bc72f2b0/konica_bizhub_c224e_admin_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca4e76cd-fa0a-4ed9-be96-1fe2ecdd21f1/shark_vacuum_ownership.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc1c83be-6773-4da7-859d-f576b53179c4/beforipogukal.pdfIn PDF document text
    • http://tadezaxe.rf.gd/david_deida_way_of_the_superior_man.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cbf62f4-64c4-4178-9712-399b32d827b3/keviwananilowomiforo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78a0377c-10f0-421c-a98d-31e14229855d/hp_officejet_pro_8620_ink_refill.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010ea6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10EA6 13312 bytes
SHA-256: ed30421c5625b5a0667e64a717fdf21eff21628a4189d4349eee8dae12f94b71
font_00_sfnt_off0000fbd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD1 5556 bytes
SHA-256: 0719a21de588fb62aad1b499fef9de34703e2eca914b20bf202be1012b456c23
font_02_sfnt_off00013420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13420 11404 bytes
SHA-256: a87991a63fc4fc0744141b837d36efee13e711957023a4575803a309382b1063