Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5a82109878a227…

MALICIOUS

PDF

83.5 KB Created: 2021-03-07 05:30:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59e5c01371e7e7ccf68fcae8683e6121 SHA-1: dce0abe499d4f9a075f1f62a286de15678836ad1 SHA-256: fb5a82109878a227aff279ad133d7ecd2145f45cb6cc33dd96b10128c5ceb397
164 Risk Score

Malware Insights

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

The PDF file contains a lure for 'pokemon go hack apk download' and embeds external links, one of which is a suspicious URL. ClamAV detected this file as Pdf.Phishing.Trojan, and a machine learning classifier also flagged it as malicious. The presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/wix?keyword=pokemon+go+hack+apk+tutuapp+download
    • https://static.s123-cdn-static.com/uploads/4471958/normal_5fccf58a5abec.pdf
    • https://cdn-cms.f-static.net/uploads/4504922/normal_5fd63745e1e9a.pdf
    • https://static.s123-cdn-static.com/uploads/4401714/normal_5fc9156c59de3.pdf
    • https://cdn-cms.f-static.net/uploads/4451049/normal_5fe9ff6ae2231.pdf
    • https://cdn-cms.f-static.net/uploads/4420025/normal_5fdad6525e193.pdf
    • http://pavezala.iblogger.org/what_is_composition_photography_definition.pdf
    • https://static.s123-cdn-static.com/uploads/4477658/normal_6001e00352058.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_ee402a46f0154145b0da8461e5c3db82.pdf?index=true
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_185c9e6ed4d04150a482a58c3b21144b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/70580162-c586-4352-84a5-d437676b7c91/wanutuveke.pdf
    • https://03f57db0-fbcf-46ec-8713-21b5992b8512.filesusr.com/ugd/455f95_09468f35ec9d45159895d5e19ea50367.pdf?index=true
    • https://uploads.strikinglycdn.com/files/34bfb3c5-011f-476b-a12e-e0966f5516a3/67392158323.pdf
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_9417e9b89ffa43e282b2a992bf63b9be.pdf?index=true
    • https://a529afa0-707c-494d-9cee-e9df2360aa12.filesusr.com/ugd/a6e48a_2e62f26230fa410aa08c2e8302613027.pdf?index=true
    • https://uploads.strikinglycdn.com/files/25b0ceeb-6d41-4e95-8ba7-272ba8f99d72/69805992581.pdf
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_e16140dfa0e54c10b545aa3b5fa7c6a9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3161f173-af3f-4e97-bff1-f90baa7537d3/74037628571.pdf
    • https://41d9b059-0b17-466b-96e6-f31a3f3e9b19.filesusr.com/ugd/f1ead9_af7bca67025f4dbfb96e8917fe45fc4f.pdf?index=true
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_37522e9bdbf64151b1e1dfe91acaea5d.pdf?index=true
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_bedcd97bc0914b069ea98993959ad238.pdf?index=true
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_c8c12b9111de4e2bbe9c9c1bdbe55ba7.pdf?index=true
    • http://puwagof.rf.gd/kitten_s_first_full_moon_worksheets.pdf
    • https://uploads.strikinglycdn.com/files/626ea139-d555-4b26-a3c7-23900882d421/why_was_the_ruger_sr9_discontinued.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f538.bin
6d3c6573c3a80bda042a19f00a5a3d35f4fcde262c268288ec7be1098b69caef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF538 5372 bytes
font_01_sfnt_off00010770.bin
8c078a2848d2cdbac063916c99af91e65f7df7c0cf3e3a26ad0c3cdc527de833		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10770 10208 bytes
font_02_sfnt_off00012aa7.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA7 16092 bytes

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