Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea07d97ca3788151…

MALICIOUS

PDF

78.7 KB Created: 2021-06-11 01:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2e7f49de41544ec812a52e2a0aeae1ef SHA-1: e5d2025e66a1a3443141baab5865b0c5ff30c031 SHA-256: ea07d97ca3788151eb6c019e189835d50d76649490540af54a2b7bb993cd90b2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on 'https://inwebjor.ru/pbw?utm_term=free+photoshop+infographic+template', suggesting a lure for phishing or malware. Heuristics indicate this PDF acts as a link farm on disposable hosting, and ML classifiers and ClamAV strongly flag it as malicious. While no scripts were explicitly extracted, the structure and embedded links point towards an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://inwebjor.ru/pbw?utm_term=free+photoshop+infographic+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447903/normal_60232d42d145b.pdfIn PDF document text
    • https://senuwisaf.weebly.com/uploads/1/3/4/0/134018119/dekuwuwimevomawilu.pdfIn PDF document text
    • https://besikutusesa.weebly.com/uploads/1/3/2/6/132681218/butosetakoza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469355/normal_600225c178629.pdfIn PDF document text
    • https://zapadakutomar.weebly.com/uploads/1/3/2/6/132680787/gipoj_jevijumutokakaf_godojilelivevas_fafutiwidizu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371497/normal_5feb17298957e.pdfIn PDF document text
    • https://xuwowazasoko.weebly.com/uploads/1/3/4/0/134041707/vakelofifud-pexinagami-wusarexip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383160/normal_602893e553d57.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuzidezidaxi.pbworks.com/w/file/fetch/144842508/exercicios_sobre_circunferencia_e_circulo_8_ano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62d8d1d3-da85-4e1a-aa48-e7f1a868d993/fukugiditodivinesabawin.pdfIn PDF document text
    • http://rumusapage.pbworks.com/w/file/fetch/144722538/6676055338.pdfIn PDF document text
    • http://nowefuro.pbworks.com/f/materi_manasik_umrah.pdfIn PDF document text
    • http://nolumemonip.pbworks.com/w/file/fetch/144563388/sarupopifinopake.pdfIn PDF document text
    • http://subazim.pbworks.com/w/file/fetch/144565416/makro_gym_equipment_catalogue.pdfIn PDF document text
    • http://fifafar.pbworks.com/f/how_does_electric_shock_therapy_work.pdfIn PDF document text
    • http://xemademeku.pbworks.com/w/file/fetch/144678735/woxotulun.pdfIn PDF document text
    • http://volikedejefa.pbworks.com/w/file/fetch/144990381/ronotevalut.pdfIn PDF document text
    • http://nafidob.pbworks.com/w/file/fetch/144942393/gba_sword_and_shield.pdfIn PDF document text
    • http://siwuromo.pbworks.com/w/file/fetch/144424731/61667316542.pdfIn PDF document text
    • http://vatezerajigo.pbworks.com/f/18135177538.pdfIn PDF document text
    • http://sufasujozu.pbworks.com/w/file/fetch/144935910/rufus_on_ubuntu.pdfIn PDF document text
    • http://xuwajesorewo.pbworks.com/w/file/fetch/144622836/what_foods_to_eat_on_advocare_10_day_cleanse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf70437e-bc81-48a1-9719-39f4047ec00b/95788875640.pdfIn PDF document text
    • http://mogulazedub.pbworks.com/f/dajaka.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_off0000f713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF713 5384 bytes
SHA-256: 22be8159457f1505f4c715e9de27a8f32e4c815cb6375d8fac79006570907ac0
font_01_sfnt_off0001093d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093D 10640 bytes
SHA-256: df6493c0c7025231a69c0dbdad7a30627a1fab6264b5b463e3b2418dc792379f