Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca7e92f380816e9…

MALICIOUS

PDF

90.5 KB Created: 2021-03-08 19:51:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0b661d1f6eebf0be8c553828b003e397 SHA-1: 45b346c37516dcf26ca01989d2cecc1360397a07 SHA-256: dca7e92f380816e92ca42ea2520fca5acb124220f5227be7b78567a692f4fbf0
194 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or phish for information. The presence of a 'download button' lure further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://dugedepap.ru/award?keyword=graphical+user+interface+design+in+java+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384470/normal_6029e9de9edf1.pdfIn PDF document text
    • http://fionainthefield.org/life_below_zero_torrenteme3m.pdfIn PDF document text
    • http://rizaxezo.iblogger.org/42691058240.pdfIn PDF document text
    • http://senteber.site/andy_sheppard_redfernstit64.pdfIn PDF document text
    • http://wegansit.space/acorde_eb7_pianomdrst.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464852/normal_5fd33f7fb9888.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504568/normal_600c83b7178a5.pdfIn PDF document text
    • http://instasale.company/15736694625c60xd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401703/normal_5ff71c092b1af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480728/normal_5fe79d2080f2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489058/normal_5fceb79cb2864.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449973/normal_602d0c9ed5d07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374189/normal_6003fa392c60d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493200/normal_5feb585c02d9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428329/normal_601b0ae717eed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381082/normal_5fefe17381e92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5fd119e564387.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_ffbd96e4f0924dedb778229521916491.pdf?index=trueIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_40a9635bdc1a4f28a8889b1e872aa4ff.pdf?index=trueIn PDF document text
    • http://wejajedotote.epizy.com/muramefuvuturonoravuli.pdfIn PDF document text
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_df489c2a99894a609f5b8852ad95b48e.pdf?index=trueIn PDF document text
    • http://sugunava.epizy.com/lg_tone_infinim_wireless_review.pdfIn PDF document text
    • https://be9c8297-50e9-4ec8-be22-7cc4068ef96a.filesusr.com/ugd/fc3b0b_b000392b1a8c4819beca8c0b18c2eb07.pdf?index=trueIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_241c80a0053849d1a32ae832e57bb9d9.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11841 5356 bytes
SHA-256: e2e544aafa0b119049408866287a9304019c874014a8bdb8b8c2b59ebb2e2686
font_01_sfnt_off00012a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A80 10376 bytes
SHA-256: 0224400f563f074928f428dfb6a05f679667c3bf0aed877e775b9ad9ac9af327
font_02_sfnt_off00014e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E03 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361