Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2b7a2a1fea47f0…

MALICIOUS

PDF

62.2 KB Created: 2020-10-14 04:34:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2d43a41b10d0ad45e1f9fc873bde49e9 SHA-1: e3efc42ed144a8f0a720be631dfde11e5cc8763b SHA-256: 4e2b7a2a1fea47f0c2edacff2c42bde02a7819f759a2438c393f1a220ee76ade
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://ggtraff.ru/strik?keyword=sims+3+apk+download+uptodown In PDF document text
    • https://site-1042983.mozfiles.com/files/1042983/12606738341.pdfIn PDF document text
    • https://site-1038946.mozfiles.com/files/1038946/36341999121.pdfIn PDF document text
    • https://site-1037180.mozfiles.com/files/1037180/neputadugegavu.pdfIn PDF document text
    • https://site-1038597.mozfiles.com/files/1038597/74822508595.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/3257372.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/vanojiraxajerubefiza.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/laresisif_kigadebokenub_bajutinerid.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/8c3f11ed.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/caa64.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0214/5186/files/21219335145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6082/0133/files/73503575337.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1541/2632/files/74087986321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/9092/1622/files/sets_worksheets_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6284/8419/files/maplestory_chief_bandit_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3368/8226/files/96265312316.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B7 5432 bytes
SHA-256: 8fa36f7521784060b6107dec688eb5f77db570698167798a76bf31ee5afe76f2
font_01_sfnt_off0000ba27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA27 15468 bytes
SHA-256: 8dd70af4c9dc025e57392719c0d672eab9214e4e557e789b7fd751c3028690db

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