Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd05ca0433504218…

MALICIOUS

PDF

89.2 KB Created: 2021-05-03 10:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4375fb24a2c0aaf71df51639f83ae1bb SHA-1: 2841fa4f87c8810de81ae03d638dc1c8f5a7e474 SHA-256: bd05ca043350421833c7c73243f841998e1655af42aa812339901c1fba8ae6ad
226 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. It uses a password-protected-archive lure. 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 0.9990

Heuristics 7

  • 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.
  • 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://soxebez.ru/strik?utm_term=the+lively+art+of+writing+by+lucile+vaughan+payne PDF link annotation
    • https://bunafigokakataw.weebly.com/uploads/1/3/0/9/130969192/229c8adc03.pdfIn PDF document text
    • https://xavitutasufeja.weebly.com/uploads/1/3/4/6/134669981/mowujorek-mujiniwivobagid-lajevavejamolad.pdfIn PDF document text
    • https://cdn.sqhk.co/lidesoxu/hhihAgj/mariage_d_amour_partitura_para_piano.pdfIn PDF document text
    • https://dijafujuzu.weebly.com/uploads/1/3/4/3/134369935/zewidududilisiki.pdfIn PDF document text
    • https://molisemopum.weebly.com/uploads/1/3/1/4/131437834/260ae7663f.pdfIn PDF document text
    • https://lijogidatu.weebly.com/uploads/1/3/2/3/132303170/2594110cb46.pdfIn PDF document text
    • https://cdn.sqhk.co/wukatigubo/hhsjijb/mazukozuxu.pdfIn PDF document text
    • https://zevoxonigex.weebly.com/uploads/1/3/5/3/135300088/6bee3d1277.pdfIn PDF document text
    • https://cdn.sqhk.co/liritefebat/ohep8hd/95217262481.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/xokodajo.pdfIn PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/zobotuzami-mitidumumunuf-dolufutafenisi-sinukedasis.pdfIn PDF document text
    • http://kemamibuke.mygamesonline.org/35071793460.pdfIn PDF document text
    • https://rominekajamarol.weebly.com/uploads/1/3/4/0/134040464/5966895.pdfIn PDF document text
    • https://zawamobapuve.weebly.com/uploads/1/3/5/3/135383520/kulozosoriv.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
    • https://uploads.strikinglycdn.com/files/53cda793-bcf4-4adc-88a3-5fac01955540/baby_groot_and_baby_yoda_t_shirt.pdfIn PDF document text
    • http://maxuluxusit.atwebpages.com/complex_numbers_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28a9f628-a517-40e3-978d-1dc9788e1e06/sisurisomulekiwepuzet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ff9844f-565c-4d54-9602-6a1b332d2c68/practice_the_presence_of_god_by_brother_lawrence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec07fefa-5c47-4f9e-b3ba-db899937e8ba/solid_state_chemistry_and_its_applications_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4e4e7ca-81be-4281-9606-2c2609ba3cf3/mafia_skidrow_rar_password.pdfIn PDF document text
    • http://lawesiwewif.onlinewebshop.net/fiwajitowamofewetopex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/431f5616-adaa-4c5a-b699-4370aeef5a66/roomba_error_5_left.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f98d60dc-1967-40e3-a95d-0614c67b49ef/30104962047.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_off00011097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11097 5324 bytes
SHA-256: cbfda607a4fa4297da596d33bef6d66a688b8684c2f1137ecc66d0ac3b23bda9
font_01_sfnt_off000122c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C8 10956 bytes
SHA-256: 654862005d7dd632395c000c20cdcb00cfec8f81af5515da5968ed653faa1b08
font_02_sfnt_off00014849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14849 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34