Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b913ae5fae5cfe8…

MALICIOUS

PDF

37.1 KB Created: 2020-08-23 16:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 529b4280ef256b0f3f48c7d305b87b3d SHA-1: 4ded301bc65690dab75cfba0c1ae1b24c0fc22dc SHA-256: 5b913ae5fae5cfe8f2f64c8659885d9093067dd7e9c3fbe2cc2c76ef93e10e51
162 Risk Score

Malware Insights

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

The PDF document contains a lure related to movie downloads, which is a common tactic for phishing and malware distribution. It embeds numerous links, with the primary one pointing to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. Although no scripts were extracted, the presence of malicious links and the document's deceptive content suggest it's designed to lead the user to harmful content or downloads.

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.com/pify?keyword=vaastav+movie++pagalworld
    • http://files.thaddeusart.com/uploads/1/3/2/6/132681992/novama_kijawuwur.pdf
    • http://files.northcoastoutfitters.com/uploads/1/3/0/8/130874058/8006452.pdf
    • http://rivix.rpskillsunlimited.com/uploads/1/3/1/8/131857334/730c6293a25800.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/jenibuxowowivoxaxoti.pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3013/files/fovurajixe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7024/9374/files/91720156723.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/zukeditowubixozutumab.pdf
    • https://cdn.shopify.com/s/files/1/0437/2814/2501/files/tilitidavuzekoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/2440/1063/files/22644962412.pdf
    • https://cdn.shopify.com/s/files/1/0444/4323/8567/files/green_bay_schedule_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/guxudozenugileguxikavamik.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53293114795.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/research_assistant_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/mabidakek.pdf
    • https://cdn.shopify.com/s/files/1/0429/8443/9971/files/nijobupufixewigim.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052eb.bin
3932ae9afd6fa1cba225fe100c76e7c16609efa0bbad23da98d40c21af014438		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52EB 5396 bytes
font_01_sfnt_off00006545.bin
65160659a792d143fd62f74a59644a7c9f8c468175b7219b6014c57b90cc4fe2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6545 10096 bytes

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