Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f52c57231d3782…

MALICIOUS

PDF

35.1 KB Created: 2020-10-03 09:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 2c34d3126d7cff8efbdcf1e109ad8ea3 SHA-1: 6e854abec071a0e7b0594655c2378c8229425d15 SHA-256: 19f52c57231d3782a3b3ebfe2d0d55e9c864a79682438dbcb026236a53745d92
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://gettraff.ru/strik?keyword=ulaunchelf+v4.37+dvd In PDF document text
    • https://site-1037212.mozfiles.com/files/1037212/povilavoxizag.pdfIn PDF document text
    • https://site-1039896.mozfiles.com/files/1039896/mafuwij.pdfIn PDF document text
    • https://site-1038908.mozfiles.com/files/1038908/87260675123.pdfIn PDF document text
    • https://site-1037085.mozfiles.com/files/1037085/58801254597.pdfIn PDF document text
    • https://site-1038402.mozfiles.com/files/1038402/lalozuzetapabulafomisabo.pdfIn PDF document text
    • http://files.nolimitstechnicaldiving.com/uploads/1/3/0/8/130874265/gezufipaxo.pdfIn PDF document text
    • http://files.thechristianleftblog.org/uploads/1/3/1/4/131437924/9141183.pdfIn PDF document text
    • http://kilegej.auroramidwife.com/uploads/1/3/0/7/130776661/4031336.pdfIn PDF document text
    • http://vawopuw.eastsideyoga.co.uk/uploads/1/3/2/6/132682630/pasomowanarif.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/1/0479/1635/1655/files/46321232026.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/32329310706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1841/9865/files/21341812318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0222/3013/files/james_alefantis_instagram_pictures.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_off00004aae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AAE 5248 bytes
SHA-256: b456176ecfcb5dd1c3b44c29a42b7f9addbccf6b7dbc70627d4a870d198f557b
font_01_sfnt_off00005cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB1 10432 bytes
SHA-256: 49fb3d223e43bccf88bece933bb77dbeb7845b2b2ad05a7a149f702ec46de43e