Malicious PDF — malware analysis report

Static analysis result for SHA-256 624e71e6573414b8…

MALICIOUS

PDF

48.9 KB Created: 2020-11-08 06:21:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 923919aedc26951efca020c9f0f4c193 SHA-1: 77f75265ff66cf928898765c16b16b9db9dc341f SHA-256: 624e71e6573414b811aaf757b9dfe3911cecc073ee48973fb44e83d55bd584a6
116 Risk Score

Malware Insights

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

The PDF is identified as a screenshot lure, containing a single image and minimal text, designed to trick users into clicking an embedded link. The primary malicious URL, https://trafficel.ru/123?keyword=girl+minecraft+skins+download+apk, is present in the document body and is associated with a link farm heuristic, suggesting it's part of a larger malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and the presence of external links indicate an attempt to redirect the user to a potentially harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 48 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://trafficel.ru/123?keyword=girl+minecraft+skins+download+apk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://wepigun.files.wordpress.com/2020/11/zesivi.pdf
    • https://nupokekit.files.wordpress.com/2020/11/www_mandaelpack_com.pdf
    • https://s3.amazonaws.com/gafedupeba/rufakurawatavofe.pdf
    • https://mewafibita.files.wordpress.com/2020/11/johnny_english_strikes_again_full_mo.pdf
    • https://s3.amazonaws.com/boxujetanonikuv/words_that_start_with_photo_and_mean_light.pdf
    • https://s3.amazonaws.com/sugaguxagu/58576361440.pdf
    • https://juvibix.files.wordpress.com/2020/11/gabizagamumarokidatanum.pdf
    • https://s3.amazonaws.com/vifusupegiza/tradewinds_furniture_manufacturer.pdf
    • https://sirilab.files.wordpress.com/2020/11/50475273509.pdf
    • https://jafavuj.files.wordpress.com/2020/11/80898949379.pdf
    • https://s3.amazonaws.com/zeworibuzoza/16053499973.pdf
    • https://uploads.strikinglycdn.com/files/25d3cacd-0986-4a00-8a82-1a299543e929/how_to_hypnotize_someone_to_sleep_instantly.pdf
    • https://giwopavaka.files.wordpress.com/2020/11/92067006856.pdf
    • https://s3.amazonaws.com/kezemiradigu/tuvopazaniboxot.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_off000070bf.bin
b422a6ce8f9c8a2789c8de38d940ecf2d0ad2bf872613073710f78fc854fbc78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70BF 5488 bytes
font_01_sfnt_off0000836a.bin
adf43260ed4fc36c5e8a902e268622dc116024827ba95af3bedd7f3f75035f5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x836A 8392 bytes
font_02_sfnt_off00009ff3.bin
ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FF3 16092 bytes

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