Malicious PDF — malware analysis report

Static analysis result for SHA-256 7efeabb726c71dfd…

MALICIOUS

PDF

48.9 KB Created: 2020-11-08 00:05:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 76e6a6d5d27a9390fc964da581951b95 SHA-1: 2236dcc61f353554cf553ebb374278fd8b4695e8 SHA-256: 7efeabb726c71dfdfc7bb07d3e3ae52d4c03eb5300d15386dc589e21dc95f78c
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffking.ru/123?keyword=maryluz+hair+salon In PDF document text
    • https://debaduvevuw.weebly.com/uploads/1/3/4/3/134383420/739626.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409244/normal_5f9c33f6895ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411709/normal_5fa7196b40b62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388158/normal_5f90ac820bf2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_5f9639927896b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460677/normal_5fa6504b55d78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427821/normal_5fa2110ad1109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f8a00440cb26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f8919134118f.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://s3.amazonaws.com/mubemutolewe/the_islamic_banking_and_finance_workbook.pdfIn PDF document text
    • https://fivididadese.files.wordpress.com/2020/11/waterfall_vs_agile_triangle.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/zakakuwikifovirizi.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_off00007495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7495 4616 bytes
SHA-256: 0e871a4cdb83a876cbdd5fb7420f05e7238bc23078310ae98b7ac62ceab87db8
font_01_sfnt_off00008430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8430 10744 bytes
SHA-256: efe662a24658b942b7deaa930701daf10d40851026b20c86100ff8c7655c93c1
font_02_sfnt_off0000a8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8B4 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e