Malicious PDF — malware analysis report

Static analysis result for SHA-256 7193faa4dec83898…

MALICIOUS

PDF

42.8 KB Created: 2020-10-08 16:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ce067fd1c631af7e83f3bbdc8aa3878c SHA-1: fb6d793238c337b294f5c6ecc3ae4ec29c0d3a03 SHA-256: 7193faa4dec838980c5276b73dafe5dc90f837a7a1e335b61a3e3afb4eca035a
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm, with several pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches one of the identified malicious links. The primary attack pattern observed is the use of these links to redirect users to potentially harmful sites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/strik?keyword=amabile+1996+creativity+in+context+pdf In PDF document text
    • http://kixaw.fzengineers.com/uploads/1/3/1/4/131437233/1269297.pdfIn PDF document text
    • http://files.glamaffair-co.com/uploads/1/3/0/8/130874075/3866e3c.pdfIn PDF document text
    • http://files.toffeecraftshawaii.com/uploads/1/3/1/4/131437864/nozujefitasisujunefi.pdfIn PDF document text
    • http://files.pawsitivedogtraining.org/uploads/1/3/2/6/132683154/lazowowufitavat-lakugiwumoj-roxodulolan-foligipetas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0471/0678/5430/files/vuziriwuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1134/2242/files/13_18_-_5_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/cortland_elementary_school_cortland_il.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4016/7320/files/18894920137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/89711425254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1743/9902/files/plitvice_lakes_national_park_pictures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7243/2544/files/porikepifonuxikako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7353/5142/files/73155136409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0004/5465/files/pearl_jam_nothingman_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/parts_of_a_sunflower_plant.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/9922/4983/files/smule_apk_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/maluxelaliresifoliwamupox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4388/0611/files/39857212040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/jatonawuwamixibib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/camden_military_academy_reviews.pdfIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAE 5632 bytes
SHA-256: 5f8692f0c5dfb185a594c0b26ca254efbca1d7e94ef4c6d7ad9dc97b2f73d007
font_01_sfnt_off00006ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBF 9620 bytes
SHA-256: 2e301d45046d40e5a9cf54812aefdf485983f06bc08ba079b3c1fc7ec24a53ef
font_02_sfnt_off00008f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F98 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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