Malicious PDF — malware analysis report

Static analysis result for SHA-256 077e4f27acee3566…

MALICIOUS

PDF

73.7 KB Created: 2021-03-17 07:58:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 84c6960ea69a75be94b77be8247d2881 SHA-1: db1a3ce11bfc1c469fbe28cd81335c7fcc483e25 SHA-256: 077e4f27acee3566d1eebc73d26530338eedb7fa38361ed0dd69f4d32d4aa6b4
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The presence of external URIs and the overall structure suggest an attempt to leverage SEO tactics for malicious distribution, likely as a phishing lure or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/award?keyword=cbse+class+9+biology+book+pdf PDF link annotation
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/lilaxefipopojitapi.pdfIn PDF document text
    • https://zokilare.weebly.com/uploads/1/3/4/7/134767859/tikarader-nejuwesisipakan-nugefub-dugimelexulitib.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/045a322c3612e.pdfIn PDF document text
    • https://tukadivi.weebly.com/uploads/1/3/2/6/132695248/7ccffee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444655/normal_5fcef5865a2c3.pdfIn PDF document text
    • http://sakekoduside.iblogger.org/catholic_university_of_malawi_application_form.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416660/normal_604b0e4f72cac.pdfIn PDF document text
    • http://gozatelaji.22web.org/free_loft_bed_plans.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484641/normal_6016de42ea675.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474448/normal_5fc726af57cac.pdfIn PDF document text
    • https://fitikuwez.weebly.com/uploads/1/3/2/6/132681307/zixobifo.pdfIn PDF document text
    • http://biditudoti.22web.org/tumutepowegufudi.pdfIn PDF document text
    • http://raxaterov.iblogger.org/chemistry_notes_download_class_12.pdfIn PDF document text
    • https://dujomujur.weebly.com/uploads/1/3/4/8/134883281/6a566f88b168499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403804/normal_5fdc1aed7f4d9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wonuzewidej.epizy.com/color_psychology_read_theory_answers.pdfIn PDF document text
    • http://buletamapa.rf.gd/notekanametuxitunigufoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee7b46f-479a-42f6-87ea-a6e98986041c/rv_water_heater_lighting_instructions.pdfIn PDF document text
    • http://guvamimifufirar.rf.gd/dasozuxurowelabipododof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aded96ce-e981-47d3-91e8-1d6cb9b80354/14488239872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/717e008c-413c-40aa-a14d-306a257c1e08/kaxazikasel.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_off0000e236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE236 5592 bytes
SHA-256: efc5d424c9ee6b2a52101984bb8d12cea2c845a84b5d242f5185e6fe9cf01369
font_01_sfnt_off0000f55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55D 10672 bytes
SHA-256: 6a0e5614e879c1fecc53d369ca0007e663010450ffec9366004c259785237b52