Malicious PDF — malware analysis report

Static analysis result for SHA-256 0966fbda90327993…

MALICIOUS

PDF

75.4 KB Created: 2021-06-08 07:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0d403ea2b2dd2962ce31e75fcd3c8815 SHA-1: a9042a9c4f27819d9cd0e2dba6566bfea36474a9 SHA-256: 0966fbda90327993a0a50400a4434533f2aaa33fc78283a58568d1abcddf83d4
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links pointing to disposable domains, a common tactic for SEO manipulation or distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The embedded URLs and the PDF link farm heuristic suggest the primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://garglob.ru/pbw?utm_term=what+does+service+4wd+system+mean+on+jeep+grand+cherokee PDF link annotation
    • https://vulesavub.weebly.com/uploads/1/3/6/0/136095957/df5ff139f5a7.pdfIn PDF document text
    • https://gugakelu.weebly.com/uploads/1/3/5/9/135965899/xavik-moxofenipapog-kuzunilodiwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390324/normal_604805eb9278a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_5fe6e0785019a.pdfIn PDF document text
    • https://diwujuxopawarow.weebly.com/uploads/1/3/0/8/130874606/459446aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410702/normal_603bbc99d7364.pdfIn PDF document text
    • https://ruvatekokero.weebly.com/uploads/1/3/1/4/131437102/boranir.pdfIn PDF document text
    • https://wuwawumakilur.weebly.com/uploads/1/3/4/8/134875279/mafulob.pdfIn PDF document text
    • https://fofawuparojimi.weebly.com/uploads/1/3/1/0/131070926/winumu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485001/normal_6036abbb84d03.pdfIn PDF document text
    • https://wanezetisozol.weebly.com/uploads/1/3/4/4/134468493/7402886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408851/normal_606d42bc32b8d.pdfIn PDF document text
    • https://vaxelifudef.weebly.com/uploads/1/3/6/0/136082166/zawamomesutujiriwa.pdfIn PDF document text
    • https://naxaludegefow.weebly.com/uploads/1/3/4/7/134776308/c04ff331b6bfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_601d7e115f334.pdfIn PDF document text
    • https://kakoxisowi.weebly.com/uploads/1/3/4/3/134358665/vofipivetowilodipo.pdfIn PDF document text
    • https://pubixewamobuvu.weebly.com/uploads/1/3/7/5/137515712/e75295.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/42db69a9-6b57-42bf-a1f6-e952325028f6/best_digital_ad_campaigns_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6c5c5bc-e135-479f-9dce-44b595dfaf7d/2017_jeep_cherokee_service_shifter_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64e3e3dd-0544-4582-b8ea-c8b5cff65980/ejercicios_presente_simple_y_adverbios_de_frecuencia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91778aa9-e552-4b96-91b0-11ad6d309dbf/what_do_all_the_standing_stones_do_in_skyrim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd881c3f-edf2-49d4-ad95-f4bc482ad57c/97793435351.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_off0000e8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C3 5948 bytes
SHA-256: f9cdd00e6cb1084d9e07eac6fc0a46bb58be635b892019bf4ec22489bdfcf10a
font_01_sfnt_off0000fd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0E 10036 bytes
SHA-256: 80d6819381b78b5d5b899e6dd20d1d5aa8a36ee0ccecf0c44afecc132721263c