Malicious PDF — malware analysis report

Static analysis result for SHA-256 06d338c268f28077…

MALICIOUS

PDF

79.0 KB Created: 2021-03-10 05:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e4252f227ddf469be8e284602f3c1b67 SHA-1: c4b0fdbdfcb249340bb875b9d7dd7394a830705a SHA-256: 06d338c268f28077e43144f4efd1241d5f5c95fd0f97d8aa3e817f3d38b8c802
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting or known malicious redirectors, indicating a link farm designed to distribute malicious content or phish users. ClamAV and ML heuristics confirm the malicious nature of the PDF, classifying it as a phishing trojan. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=is+there+going+to+be+a+season+2+of+made+in+abyss In PDF document text
    • https://joxukitemubat.weebly.com/uploads/1/3/5/9/135957717/nutotosufela_gazunotawemavom_sator.pdfIn PDF document text
    • https://kalabuzamebuku.weebly.com/uploads/1/3/4/3/134339718/tijibiziriti-vijajiduva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468554/normal_6037e24e8c0c2.pdfIn PDF document text
    • https://sofakixejiz.weebly.com/uploads/1/3/4/2/134265497/punemulogi_benuk_zawalixuxibed_nuzovolukizomo.pdfIn PDF document text
    • http://tublitalia.space/download_spicefx_6_full_crack89z04.pdfIn PDF document text
    • https://turonobofudub.weebly.com/uploads/1/3/4/4/134463989/654873.pdfIn PDF document text
    • http://interbank.link/vice_news_hbo_time3r0m1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405895/normal_5fe7eccb48946.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413227/normal_5fd6aedd77389.pdfIn PDF document text
    • https://mowasevibipogo.weebly.com/uploads/1/3/1/3/131379904/sagebexijuv_gedefovoka_rafujem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_5fd83e0948a69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489407/normal_601b3612b6e6c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/chess_2_player_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/android_studio_adb_upgrade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a05972d-58d0-4a22-9596-245a2773236d/juditumudojanabuve.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/feravaratonokejarudijowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9480d03-2028-42eb-833d-466ebde1ccc8/52562071921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a46e9c9b-8aae-4ed4-896e-2b9d6eeb200d/60756698714.pdfIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_c8c4ee3393234341a436743195645dd3.pdf?index=trueIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_716a3e0b2f50478fbdd4f9b77e428378.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe3d69a2-f982-4f27-af61-fc49c3d09643/scott_joplin_the_entertainer_easy_piano_sheet_music.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_off0000f59b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59B 5600 bytes
SHA-256: d3c77dded018c12e33f14c23ec43ba9dff9b6812c7eedca95e059bf88db9a7d4
font_01_sfnt_off00010880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10880 10960 bytes
SHA-256: dc71143783cf1a047d1b206d88c98b5ce0c3a4bda86c2b6ece12341a4eebf8ce