Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac9e3ec0315a2e0…

MALICIOUS

PDF

70.3 KB Created: 2021-04-04 16:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8ed6adcd087f37c16847f066c2c86e97 SHA-1: 65542bf2ad66523201880cd988bdc84e0c24fdd0 SHA-256: 7ac9e3ec0315a2e0f29a89d403893442c4c294fac3316d96efef8b813a9a6471
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicates maliciousness. The presence of external URIs and the 'link farm' heuristic suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/wix?keyword=veriloga+manual+cadence PDF link annotation
    • http://kelimap.mywebcommunity.org/attestation_employeur_cesu_vierge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415321/normal_605135b278043.pdfIn PDF document text
    • http://potuxoposutu.medianewsonline.com/kufulem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_5fd686bad403e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391037/normal_600c84ae96244.pdfIn PDF document text
    • http://creditreportus.info/950120485808we0m.pdfIn PDF document text
    • http://fozogadixanemo.iblogger.org/better_business_bureau_irvine_california_phone_number.pdfIn PDF document text
    • http://daselefufirapim.iblogger.org/ledger_database_template_access.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479470/normal_5fccf499bfdc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466173/normal_604bcb35f1f48.pdfIn PDF document text
    • http://premial.su/xuwupilonudogufesubewutuybrc.pdfIn PDF document text
    • http://appless.space/786654037453m79f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mujasanowagug.epizy.com/fulupuzedufunizes.pdfIn PDF document text
    • http://tagetebaj.rf.gd/english_accounting_dictionary.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/cules_son_los_sntomas_de_piedras_en_la_vejiga.pdfIn PDF document text
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_ef70a1b90aa04da09428868902511b53.pdf?index=trueIn PDF document text
    • https://d7e981a8-8c4a-445e-aef0-60d3d4911bd2.filesusr.com/ugd/65d69c_f668dc0e4a694ae9ba3079c16964ba5a.pdf?index=trueIn PDF document text
    • http://jujuletofu.onlinewebshop.net/luroreviwunufarux.pdfIn PDF document text
    • https://64db0a9d-d2b7-4705-beb9-75cca7f1d068.filesusr.com/ugd/4c6241_c0c4ef0e8beb46e0b59ca9bd915647f2.pdf?index=trueIn PDF document text
    • http://muvabeso.epizy.com/study_guide_for_campbell_biology_11th_edition_free.pdfIn PDF document text
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_34e1cb3a602241a58dbc55d1b147373d.pdf?index=trueIn PDF document text
    • https://0c3b2bb2-3ac9-4e0e-a0b2-530a831cdf0d.filesusr.com/ugd/23193f_adfec854f5db46f79df06e05c4a1387d.pdf?index=trueIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_23dab36dc41442ef9c585e40fdb09f61.pdf?index=trueIn PDF document text
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_ba69debc454c4287a84462ce32cb24d9.pdf?index=trueIn 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_off0000d5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AA 5044 bytes
SHA-256: 42ae10b569295c58332daf0ed7ac0051a5d75cc945aca5a758095df409c2c0d5
font_01_sfnt_off0000e6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BC 10816 bytes
SHA-256: f5c893bfac5c8b446849ec44f6b069d704d623cb828d5e4ec6226a93ffc40f48