Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b7de3c1974564d8…

MALICIOUS

PDF

83.7 KB Created: 2021-04-17 01:56:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 391a8ef63e84f0787b8de0f0d866c85e SHA-1: 23ad4ac19b2c4a1f854bddff7562ce82d9307842 SHA-256: 5b7de3c1974564d8f8659558b6338b44ef69b09480d97de72a69f6e6c2eb4082
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a significant number of external links, identified as a link farm, and is flagged by ClamAV as a phishing trojan. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be intended to trick users into downloading an archive, which is often used to bypass gateway security. The presence of embedded URLs and the ML classifier's high confidence further support a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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
  • 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://jottigo.ru/strik?utm_term=how+to+close+total+gym+xls PDF link annotation
    • https://kuwugexikoxol.weebly.com/uploads/1/3/4/7/134718068/570288.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374852/normal_5fd042532639e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469358/normal_5fca031a9f20a.pdfIn PDF document text
    • https://xuxerativizujaf.weebly.com/uploads/1/3/1/0/131070719/nofagidipase.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445879/normal_604dd18fb1071.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417040/normal_5ff5172dda240.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467571/normal_601ae08692d8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446170/normal_5fd086a114bc0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a08f4f-1dfc-47c9-a862-7267f53e4696/ver_el_mundo_de_sofia_pelicula_completa_en_espaol_latino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/653f8858-b832-486f-b7b2-f35dad3a5818/importance_of_being_earnest_summary_act_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44b7cea1-eb21-494a-9eaa-de1912457516/brother_mfc-j835dw_wireless_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c19de9ec-1290-462f-9b30-a0e890084473/how_do_you_know_if_something_is_expository_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac3466ef-c31f-4928-a47e-fea62a3cf6d0/nixokobebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/121f2c3d-7b05-4eac-98be-3a4d27fc8117/porilonuxenimejorofuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d97f364-c53b-432c-8df3-a3bcb0122abc/13322431623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5212c7bf-87ab-432a-8706-2ac07fb5b5b0/kirevaxuwolitor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f55d989-3155-45f7-833f-4443083b0d33/craftsman_12_bandsaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34980434-7d22-4b52-892f-e74d1991d6cb/12964283238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e39a99e3-a30f-415b-bf3a-e711ea6065fc/microsoft.flight.simulator.x.gold.edition_-_skidrow_winrar_password.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10985 5244 bytes
SHA-256: 07cd1041f663df7ca71ac97ff2aa25a4ec252d22fa802effbd818a1942628ccc
font_01_sfnt_off00011b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6F 10876 bytes
SHA-256: b8a56ba7471db90b7cc1f504eb153ed3c56e9a34c666767fb253094792758042

Open this report in the interactive analyzer, or submit your own file for analysis.