Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f392da6cc5205b…

MALICIOUS

PDF

75.8 KB Created: 2021-01-11 12:55:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1332fbdb91a2a9b8cb9b1316cb8d0fd7 SHA-1: 27f180ed25906e4bd2a65155b5015280fd3cc445 SHA-256: 11f392da6cc5205b43c908f55d1eb512032b1d75ff5e7e9ea378605e68f7649e
184 Risk Score
Tags
free-cdn-ebook-manual-lure

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 alert for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'bullet force 2016 apk' and application metadata, suggesting a lure. The numerous embedded URLs point to disposable hosting and redirector services, indicating a phishing or malware distribution campaign.

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
  • 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 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://gettraff.ru/aws?utm_term=bullet+force+2016+apk In PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/pitapajek.pdfIn PDF document text
    • https://site-1232909.mozfiles.com/files/1232909/nugebiji.pdfIn PDF document text
    • https://site-1174988.mozfiles.com/files/1174988/kilifetatokasivetabebe.pdfIn PDF document text
    • https://site-1176001.mozfiles.com/files/1176001/cisco_stackwise_configuration_guide.pdfIn PDF document text
    • https://site-1174352.mozfiles.com/files/1174352/cardboard_boxes_lowes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390681/normal_5fe292e79c6b7.pdfIn PDF document text
    • https://site-1179316.mozfiles.com/files/1179316/fly_to_miami_from_lax.pdfIn PDF document text
    • https://site-1181123.mozfiles.com/files/1181123/96136947256.pdfIn PDF document text
    • https://site-1177607.mozfiles.com/files/1177607/53203172258.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418166/normal_5f971b1775855.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503987/normal_5fe58befa9545.pdfIn PDF document text
    • https://cdn.sqhk.co/migixurej/AYqgfje/banoxeromapaxoxuja.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/dggKihH/soxuxore.pdfIn PDF document text
    • https://natulawud.weebly.com/uploads/1/3/4/3/134309077/8253332.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491687/normal_5ff81ab9db542.pdfIn PDF document text
    • https://gibonubud.weebly.com/uploads/1/3/4/8/134877094/e939e050d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35B 5424 bytes
SHA-256: 7ce92550447e183ee795e50fb585e4a600c6af27f71b77ddb463a6141aac8406
font_01_sfnt_off0000e5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E8 10624 bytes
SHA-256: bd043ec7461073bedfc6c86ee70cc202a2dcadfd3b48f4b76a402789c066c23d
font_02_sfnt_off00010a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8E 16792 bytes
SHA-256: b2549efdc0f1e34711c49c432464b7a69e8e126c268c485c434380676a50ee0d

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