Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e2ddd16d5e0710…

MALICIOUS

PDF

73.5 KB Created: 2021-03-30 15:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d66019d6f9d3f672edfefda7213eaad3 SHA-1: c3fef08dd8bf26282504b93500a52812b3cfb4af SHA-256: e7e2ddd16d5e0710c3d2ea903bdae1f43b6d1e8d03723091cd24e2dbc76ebcfe
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating a phishing or SEO spam campaign. It contains a large number of external links, many hosted on disposable domains, designed to redirect users to various content. The primary external URI points to 'https://gimoguvi.ru/award?keyword=autocad+civil+3d+pdf+import', suggesting a lure related to CAD software imports.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/award?keyword=autocad+civil+3d+pdf+import PDF link annotation
    • https://mojoranazo.weebly.com/uploads/1/3/4/4/134403481/e8f03aff61421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450037/normal_602e7d3015a51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457561/normal_5ff2641363db5.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/ejeXHeF/world_of_warcraft_minecraft_mod.pdfIn PDF document text
    • https://tilideru.weebly.com/uploads/1/3/4/5/134589764/gilorupin_pesunekoloruzos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387052/normal_603eb7281d572.pdfIn PDF document text
    • https://cdn.sqhk.co/tedalome/6sNjaDs/dragon_ball_super_battle_of_gods_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/zamokaxu/hnIhgge/parental_monitoring_app_for_iphone_snapchat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415304/normal_5fffe8c33b1d2.pdfIn PDF document text
    • https://vorupegesozuzow.weebly.com/uploads/1/3/1/4/131453293/jutol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393193/normal_6033018f71bc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460450/normal_6062d242bf927.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489598/normal_601dd63cb7ec7.pdfIn PDF document text
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/9726972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375199/normal_605d3029cd17f.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/64eb851e-bc47-4345-95a5-8a8a3130d5f8/a_song_of_ice_and_fire_westeros_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fde21219-b2c6-49b9-89d9-4cb639c7408d/18.5_briggs_and_stratton_engine_oil_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e535f48e-e112-470f-9f85-b8ba6b9e8f1f/best_bread_machine_recipes_2020.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_off0000e18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18C 5336 bytes
SHA-256: 70d4518c1f7d12dea957c8d0e43f5841384e10a9cfac397fb083171a40209da6
font_01_sfnt_off0000f3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AA 10320 bytes
SHA-256: a4dd5bb30fb5451bf1d17973c3f792236a6121f561d36df28708d156e2d5a27f

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