Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52ac378adabcfe2…

MALICIOUS

PDF

72.9 KB Created: 2021-02-13 00:47:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1682b0a64c66e30e033c352e5f76d686 SHA-1: ef24ec3289d464adafb732d3c6e2ff19617b31c1 SHA-256: f52ac378adabcfe26e33e7025147e154f908c4b5196dd821f7938d53f5b125f4
194 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are hosted on disposable domains, indicating a link farm designed to obscure the true destination. The presence of a 'download button' heuristic and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest malicious intent. The primary URL, https://bologen.ru/aws?utm_term=critical+ops+wallhack+android+oyun+club, appears to be a lure for a game cheat, likely leading to a phishing or malware download page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/aws?utm_term=critical+ops+wallhack+android+oyun+club PDF link annotation
    • http://kejamezegujoz.iblogger.org/44679044832.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393889/normal_6021fd2bc3e76.pdfIn PDF document text
    • https://puzelosepe.weebly.com/uploads/1/3/5/3/135317481/f5636c8a4ea21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423431/normal_60186d541cddd.pdfIn PDF document text
    • https://birifukuko.weebly.com/uploads/1/3/1/4/131453348/3725692.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476285/normal_5fc990e1cf929.pdfIn PDF document text
    • https://dipabuxirakilat.weebly.com/uploads/1/3/1/0/131071076/6711907.pdfIn PDF document text
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/d89c61374ca79.pdfIn PDF document text
    • http://vugijow.iblogger.org/phases_of_the_moon_worksheet_kindergarten.pdfIn PDF document text
    • https://gitujibexilen.weebly.com/uploads/1/3/1/4/131406430/e711e6514bb1e4.pdfIn PDF document text
    • http://fasibada.22web.org/online_image_format_converter_png_to_jpg.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/Z6AckZ7/go_kart_racing_karts_for_sale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vasozebuxez.rf.gd/antares_full_movie_in_dual_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/31899771485.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/68981415546.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/japafifotabasawe.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_off0000e1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E8 5464 bytes
SHA-256: 26c000281895e18fa13ea12f19f5c9e75be96cc2e5bcec7bad42a2470a1b2acb
font_01_sfnt_off0000f47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47E 10120 bytes
SHA-256: 25858de8c1e9abd04a64fe1ac9c9e0c530d612045366281d7265da8e656964f9

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