Malicious PDF — malware analysis report

Static analysis result for SHA-256 302db77de4b4679b…

MALICIOUS

PDF

81.9 KB Created: 2021-05-12 07:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d36950849bc5c89782b63b35f665364c SHA-1: 410e5c54a8ceadc464b812ddd6fa9b0284a50e22 SHA-256: 302db77de4b4679b28a0cb8b651f3342df0f5a8ec3cd39a5416232f8120b11c6
186 Risk Score

Malware Insights

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

The PDF file 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 ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a malicious document designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://nipisod.ru/strik?utm_term=how+to+make+rag+quilts+for+beginners PDF link annotation
    • http://wojisub.mypressonline.com/52158060187.pdfIn PDF document text
    • http://fesufobototezer.mywebcommunity.org/2020_cabinet_ministers_list_with_department.pdfIn PDF document text
    • https://rexanofodifedow.weebly.com/uploads/1/3/1/3/131378899/5529601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501212/normal_600bc18d8c6e7.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/pixinegufimodati.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/medical_health_certificate_format.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454678/normal_6043ff1168db7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479210/normal_605c2620aaeb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444095/normal_60561886a4a60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466675/normal_5ff88897bb8b0.pdfIn PDF document text
    • https://wozukaziximuru.weebly.com/uploads/1/3/4/5/134587045/gewakivakake_sojupetuno_sixologi.pdfIn PDF document text
    • https://jasugupaxawuz.weebly.com/uploads/1/3/0/7/130740610/radiwig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_601b923f26c84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460706/normal_5ff2adb2a8ccf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450242/normal_6015819d1e908.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/cf040396-e140-4eef-971a-0542418deed7/char_broil_smoker_side_fire_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9dee4f2-7a74-4133-be18-affd06dcc1a4/xoxejidolixorajemulimut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10753b0b-bda6-4f89-8b4e-47900827f0c6/how_to_change_day_on_bge_thermostat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ed7a12c-6dd2-44c0-88ef-064ee7ed4ac8/how_to_connect_hp_8600_to_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab0fe4cd-5d52-4cad-bc06-4b5d3e3da9ce/siemens_thermostat_rev24_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/080693d4-7a23-4bcf-aecf-6109f85672d2/97492938013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8719a5f6-34cd-46c0-a811-11a3ebde5ed6/69624017442.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67e1a484-1cba-4be3-b866-d3859a93d7af/2009_toyota_corolla_engine_mount_replacement.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_off00010098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10098 5468 bytes
SHA-256: 51e33cfa1e52a29959e20eee99cf829340d99bd6ee388a290ac380189fa4ee8f
font_01_sfnt_off0001132d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132D 11488 bytes
SHA-256: cfcb316dffece51599b94db1a68cf4e671ae1f97eca0e8422c965cc4b8b4b685