Malicious PDF — malware analysis report

Static analysis result for SHA-256 de82361a3b85cc21…

MALICIOUS

PDF

93.3 KB Created: 2021-03-24 00:44:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9f6aa9c1dbf7f15f282167844d2b9f7d SHA-1: 1bb973307fc405cf6a978c1f2b45adc94b8315db SHA-256: de82361a3b85cc218a7a9352f33c064b0faa351c3bb7274e8f0c4d5af8a2b53f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=alesis+hd24+fireport PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4466680/normal_6001e1f138bfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412377/normal_6024f5a898d5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485156/normal_60544ed0b70f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387226/normal_60595075515e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369912/normal_605a6d8aacbe0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446260/normal_60469d226ca65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443821/normal_5fd63264bef65.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/7992367835.pdfIn PDF document text
    • http://zekifafeter.scienceontheweb.net/soil_amendments.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://timojodabemisux.myartsonline.com/bankers_adda_static_gk.pdfIn PDF document text
    • http://tumobuwixakeg.atwebpages.com/bigudapomo.pdfIn PDF document text
    • http://ganusigesu.rf.gd/nail_salons_open_sunday_greenville_sc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e97a0147-a0a4-45e2-9303-256bda1f0cfb/how_to_write_an_incident_report_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e91d2b3-5e38-4223-ba32-c96bfca9b0a4/timex_indiglo_expedition_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5803bee1-19c5-48c4-b578-88250559690b/ridololulowekusofifidot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d3c7cb9-2bab-4f9d-82cf-5887acee80d4/final_fantasy_7_remake_xbox.pdfIn PDF document text
    • http://dowupozor.epizy.com/xokip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5b4e0e8-ff2b-4ba9-b0d4-9ebccadf39cd/definicion_de_investigacion_explicativa.pdfIn PDF document text
    • http://tubujaj.epizy.com/abby_fine_reader_free_version_full.pdfIn PDF document text
    • http://busilumun.rf.gd/blaggers_guide_to_art.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d788ad24-e3d5-4958-8076-45dabc4bf20a/tedurovodivo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F4 5128 bytes
SHA-256: c1b8d645818fb6f421e3591c26ef4c3d16fb47740969af66881a33d1ca8ea1ae
font_01_sfnt_off0001286c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286C 13212 bytes
SHA-256: 254e40c0ea90a9f55a2adfcd4c8c48f8c37c789a3cf0da580da595685159fc35
font_02_sfnt_off000152c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152C8 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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