Malicious PDF — malware analysis report

Static analysis result for SHA-256 059163f6a6c07e2e…

MALICIOUS

PDF

90.8 KB Created: 2021-03-30 03:36:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 403e41d7763c6e982be3661f152260d1 SHA-1: 22e53819c6512cf0b6cdf727fcdb444fb6976a9d SHA-256: 059163f6a6c07e2e1fea44168cff4223e7e0fe1f09298605cc2f111130713ba7
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF document flagged by multiple heuristics as malicious, including brand impersonation for credential phishing (UPS) and being a link farm on disposable hosting. The embedded URLs and the document body, despite being heavily obfuscated, suggest an attempt to redirect the user to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://bivedaniliged.weebly.com/uploads/1/3/4/7/134732971/zazanifutes_xudor_guvugefasugov_bovuninusufidi.pdf.
  • 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://fokemale.ru/strik?utm_term=what+is+the+main+message+of+the+book+of+proverbs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490121/normal_600b7b8cc65d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_6052e1bc276fb.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/89235211481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462980/normal_6041820ce3c8e.pdfIn PDF document text
    • https://bivedaniliged.weebly.com/uploads/1/3/4/7/134732971/zazanifutes_xudor_guvugefasugov_bovuninusufidi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490752/normal_5fd65b05c8a11.pdfIn PDF document text
    • https://xizoxapuxuraxe.weebly.com/uploads/1/3/4/5/134598133/pobagexeb.pdfIn PDF document text
    • https://wuvobarapupi.weebly.com/uploads/1/3/0/8/130813490/dozafutol-xodusojalak.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/1._what_is_the_general_data_protection_regulation_2018.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/what_is_a_hedge_fund_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480580/normal_60476cb45e575.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378846/normal_5fffaa94130ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405197/normal_5ff2a0608b8fe.pdfIn PDF document text
    • https://tapituxupali.weebly.com/uploads/1/3/1/3/131382330/95ec21.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/038cf2bd-4496-4b7a-a6e3-9ea1d1d550bb/pawijotosilekaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/moon_river_ranch_arlington_tx.pdfIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/social_network_php_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2085ca38-b8ae-4885-86e5-729545dd9da4/aprender_ingles_basico_para_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c00bbc15-c341-42f7-977a-0967ddaa8b55/resumen_de_libro_un_grito_desesperado.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/viwuvajegamodujixigimomap.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/why_does_my_vtech_phone_have_no_dial_tone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b8f54c1-d148-4a4a-823c-d7e93a60821b/the_world_as_we_know_it_will_end_by_2050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32d38730-32f2-417e-86fc-6a035353a723/kenmore_elite_oven_service_manual.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_off00012540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12540 5560 bytes
SHA-256: 83b3c159caa0f7606b61e19e54ab5ef4d5d765adfd48f98416dc09b1a1c91301
font_01_sfnt_off00013814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13814 10876 bytes
SHA-256: f03aaf9797b43bc80a5c34f4d2a3eab31987acf616074da787f257fa10b69eb4