Malicious PDF — malware analysis report

Static analysis result for SHA-256 05fc544807c34427…

MALICIOUS

PDF

44.6 KB Created: 2020-09-21 12:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00711daa1f868217ceb9d9e3202e61d7 SHA-1: 94f9880746247badbbb41bf23a34e0385942b75b SHA-256: 05fc544807c34427b057e5f9eabf27be1ffdb811afa5f9faf1cf2a05d40a4396
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external PDF files, a common tactic for SEO poisoning or distributing malware. One of the primary links directs to a known malicious redirector, indicating a high likelihood of malicious intent. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • 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
  • 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://ttraff.me/wix?keyword=coc+fhx+server+apk+download+2018
    • http://xasag.sigmundyachtdesign.com/uploads/1/3/0/7/130776063/bijeborufazuzofuse.pdf
    • http://betuzezor.simons-petsitting.com/uploads/1/3/0/7/130739852/jinasedulate.pdf
    • http://files.cocokaboo.com/uploads/1/3/2/6/132682142/nipavofelofe-rinawekanima-xojodizebunan-vofumi.pdf
    • http://files.erinmdesign.com/uploads/1/3/1/4/131453206/laxoxenemiveziwuti.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://978b473e-f21b-4717-bbd4-132874af0687.filesusr.com/ugd/a07927_72dced61b64b4c3da37ffcdac4e3f4f1.pdf?index=true
    • https://78e9b48e-9a44-430d-b32d-5f35a9591302.filesusr.com/ugd/7fedcf_c2d4c8b0e1f849789bf3253d55570d1e.pdf?index=true
    • https://ffaa7410-1b1c-40ec-bf85-d1dc2e1f1062.filesusr.com/ugd/96768c_e15a237f6e724e92a343ee058dd8818f.pdf?index=true
    • https://ff05a745-6eaf-4740-b10f-37440c7cbfce.filesusr.com/ugd/957c7b_5c9d43d447b54e2086053df9fb7b7799.pdf?index=true
    • https://603c6637-2b6b-4702-b8a0-ca4a1221e70b.filesusr.com/ugd/d2cc1f_f56796e939e24e5da961a1f9b9357e8c.pdf?index=true
    • https://90d94d99-573f-4d9f-9f05-c250010c9520.filesusr.com/ugd/7598fa_04455c0b7b7b4798bd6c5e6a4d3602b5.pdf?index=true
    • https://37472bc0-606f-4dc9-b4c8-7189eb9f2fed.filesusr.com/ugd/0fdb6d_22bd340195304f71a7a44a00be0e8d83.pdf?index=true
    • https://51f99d03-bce0-429c-a9b8-9cc10da5bce5.filesusr.com/ugd/140efa_3d67cb3558a442a7806f0cba854fc4e5.pdf?index=true
    • https://b7c273f0-ecc9-452d-9ef5-38468319b4f0.filesusr.com/ugd/f4de5e_9c45dd4cd3524d96af04a8e4d3862c39.pdf?index=true
    • https://c98e2cc1-5756-4722-9fcc-ef93b863adf1.filesusr.com/ugd/112488_8225f1d108d3474a9e75d9f6b0ae8047.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060e4.bin
8faef781f9429c2ffae4f5cf25e7d0eb2b10270e9eaacd44640fbe80c16b5d1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E4 5728 bytes
font_01_sfnt_off00007471.bin
7a0306db3e1c7275d74c1b50fcb54f3b0328df736c55893d334de1df1329b052		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7471 10324 bytes
font_02_sfnt_off000097b5.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97B5 4324 bytes

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