Malicious PDF — malware analysis report

Static analysis result for SHA-256 9921166c5d343d2d…

MALICIOUS

PDF

75.8 KB Created: 2021-06-11 21:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c6e36092042239f01cce3199095a6ef0 SHA-1: 054994716f0183ceab5de9e66875eb95f6034547 SHA-256: 9921166c5d343d2d8284e1960bb1618f4c4051641dc749f1c09c88bc5e54ad24
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The primary URL, https://smidgel.ru/pbw?utm_term=gringo+shatta+wale+mp3+download, is likely used to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • 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://smidgel.ru/pbw?utm_term=gringo+shatta+wale+mp3+download PDF link annotation
    • https://vukexelisijaka.weebly.com/uploads/1/3/1/0/131070195/9a4fff981c596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378836/normal_5fd7d9f5517b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492245/normal_6068e286119ac.pdfIn PDF document text
    • https://lemosipezo.weebly.com/uploads/1/3/5/3/135326275/zevijupe-nefixatu-nikuwelewoto-malonelaluwuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445115/normal_6029a90d37384.pdfIn PDF document text
    • https://wovipoxutoluku.weebly.com/uploads/1/3/1/3/131383624/tuxabaxesekem_fivivupuzobomu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401515/normal_603126ea2b950.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4469638/normal_60b389ffbbf55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478688/normal_60623b3bb7701.pdfIn PDF document text
    • https://fuxopejebema.weebly.com/uploads/1/3/4/0/134018858/2115148.pdfIn PDF document text
    • https://waxogisuges.weebly.com/uploads/1/3/0/7/130776632/godebiva_mutomovojetup_zubepetadukivol_ximejunef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486353/normal_6022df8da98c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_60c06b808fba0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fudejob.pbworks.com/f/how_to_write_an_opinion_essay_6th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65da053c-73da-428b-a95b-22622bb0ee40/jelufumezurozixosu.pdfIn PDF document text
    • http://tozuxexap.pbworks.com/f/53358085489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6566af72-67b4-43b5-9329-1aae870e1d28/the_raven_remastered_ps4_metacritic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/923539b4-d543-404c-bf84-e131e30ecfe3/paco_el_chato_libro_de_geografa_cuarto_grado_pgina_94.pdfIn PDF document text
    • http://mujusevo.pbworks.com/f/outlaw_rogue_pvp_talents_8.3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9ecd97f-2b53-49c4-8cd4-6145e5569c96/forerunner_955_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e719030b-bd94-463d-a53f-fcda23817e0b/journey_to_the_end_of_the_night_audiobook_free.pdfIn PDF document text
    • http://wafijovodek.pbworks.com/f/fulawafikor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/850a5f6a-1d2a-4120-9606-51b6f493059d/16587516475.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_off0000e737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE737 5660 bytes
SHA-256: 27f67e7604c8367a17813551993f4d403ef7ffaa5fd61e978c4a37b9c9c5c7b0
font_01_sfnt_off0000fa62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA62 11348 bytes
SHA-256: b4c60e32192d4e19b7548a75c432a6ce7945e523c833a1586ab3099d0b34fb8a