Malicious PDF — malware analysis report

Static analysis result for SHA-256 b38c1697ac7eed66…

MALICIOUS

PDF

42.4 KB Created: 2020-10-05 19:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: ea26cebe7d899c3cda15bf6abeafd85e SHA-1: 185a48aaff0f4c37754d81398bb4cb132d0a50b3 SHA-256: b38c1697ac7eed661f6c59b8b6d0dabc40420d75b039ac69dfa49a31283cebcc
134 Risk Score

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.
  • 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=essential+guide+to+apa+style+for+wal In PDF document text
    • https://site-1037003.mozfiles.com/files/1037003/74615078530.pdfIn PDF document text
    • https://site-1041492.mozfiles.com/files/1041492/5418191639.pdfIn PDF document text
    • https://site-1038874.mozfiles.com/files/1038874/12937053975.pdfIn PDF document text
    • http://labisug.adornunlimited.com/uploads/1/3/1/4/131454143/5732318.pdfIn PDF document text
    • http://xumej.anncottrellfree.org/uploads/1/3/1/6/131607110/bacf568.pdfIn PDF document text
    • http://files.romehomelb.com/uploads/1/3/1/4/131406841/nagofexomogaje.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/1/0485/2865/4491/files/np-f550_battery_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9235/2932/files/31779873225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5533/9928/files/gekofajibawusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/57665963331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1860/5976/files/duzuw.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_off00006861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6861 5360 bytes
SHA-256: 8adffa7fee53782fa313af940ea23069b82f2780e67ac8de634b67e7f20d1ec5
font_01_sfnt_off00007acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACB 10120 bytes
SHA-256: 799e61778fef8d534f070734cf1148dbe483eed6373c7d6293e00bfa80c22549