Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb261e340627df6f…

MALICIOUS

PDF

81.1 KB Created: 2021-03-29 18:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 902d6d7534d1195720ad4954689c7be3 SHA-1: 9da75ab91707c5033f781c90aef3632b700c6084 SHA-256: eb261e340627df6f7d2afdb1a10fbd90b57ca27f4daeadd457bc66325c97663b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a malicious payload. The document body's mention of 'dead cells apk full' further supports a lure for potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://resalured.ru/123?utm_term=dead+cells+apk+full PDF link annotation
    • http://rokamik.iblogger.org/43439688213.pdfIn PDF document text
    • https://cdn.sqhk.co/zevinikiwi/ezP36eq/neogeo_mini_pad_usb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374956/normal_5fe78548bf2ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464877/normal_5fc8c6cb0b124.pdfIn PDF document text
    • http://xokapik.mywebcommunity.org/andhra_jyothi_telugu_news_paper.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/WjfMhcR/tmnt_brothers_unite.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416501/normal_5fe10ca6918e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421966/normal_5ffb3bcfd154c.pdfIn PDF document text
    • http://xavukagidasali.iblogger.org/90385958221.pdfIn PDF document text
    • https://cdn.sqhk.co/jekenilegefe/eLji8PS/lenovo_laptops_walmart_black_friday.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494868/normal_6061dbe47ef30.pdfIn PDF document text
    • http://tetiviguxawik.getenjoyment.net/ps4_skyrim_mod_load_order_2021.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://s3.amazonaws.com/jolozidabi/montgomery_ward_upright_freezer_model_4969.pdfIn PDF document text
    • http://vekalaluno.epizy.com/89728160964.pdfIn PDF document text
    • http://xulufavuso.rf.gd/baghban_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/luzugolewugisoju.pdfIn PDF document text
    • http://givetupazowo.onlinewebshop.net/numbers_worksheets_11_20.pdfIn PDF document text
    • http://rovafitazilom.epizy.com/bsc_magazine_may_2020_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA52 4652 bytes
SHA-256: d9e298f8e5717913fe6b1c145bd7444effeb54b05a9bc36c4502efe7faecf8aa
font_01_sfnt_off0000fa3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3C 22716 bytes
SHA-256: 96ad7dddf8ff60dc96a6054a36c69e3d2ded6603f93a60f1c70c591df5e7f5c1
font_02_sfnt_off00012aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA6 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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