Malicious PDF — malware analysis report

Static analysis result for SHA-256 faec5e7ab3a2364e…

MALICIOUS

PDF

40.3 KB Created: 2020-10-14 00:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 388f56ef528a44786770dae1905fe9e3 SHA-1: 7d52d5b4cf53870ecea906d9db09c5c5675a7c38 SHA-256: faec5e7ab3a2364e7a4cd6da394ee6045f708955c8b747e3de4a188c6ec713dd
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://cctraff.ru/strik?keyword=type+ii+crispr+rna-guided+endonuclease+cas9 In PDF document text
    • https://site-1048491.mozfiles.com/files/1048491/56926136147.pdfIn PDF document text
    • https://site-1038494.mozfiles.com/files/1038494/kofafexagavafaruwila.pdfIn PDF document text
    • https://site-1048485.mozfiles.com/files/1048485/bawoniwofezuwaxalazoveko.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/foburadip.pdfIn PDF document text
    • https://site-1042622.mozfiles.com/files/1042622/33853789458.pdfIn PDF document text
    • https://site-1040426.mozfiles.com/files/1040426/moneniraduxe.pdfIn PDF document text
    • https://site-1039285.mozfiles.com/files/1039285/70565427906.pdfIn PDF document text
    • https://site-1036872.mozfiles.com/files/1036872/80542825860.pdfIn PDF document text
    • https://site-1040610.mozfiles.com/files/1040610/nalagubajajupivigava.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/1/0432/7122/5502/files/62354429099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4626/8828/files/ginimofitumikevutivinirod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5019/6903/files/99867898399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2969/0530/files/the_giver_vocabulary.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_off00005eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEA 5480 bytes
SHA-256: 1cf924c6ef5b2281fc601ca00fa8a1ff6c996517e6f7d06df01049a694c15237
font_01_sfnt_off000071a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A0 10124 bytes
SHA-256: 3c22f387712c188b0673ecf00a580d41111b00e3f842090d73e4842074a720db