Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a29a4a104d07d2…

MALICIOUS

PDF

59.7 KB Created: 2020-10-08 16:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 35d547c5fb3708d86f6753bcc24156d0 SHA-1: 4ba4c5b475f85214f1f0f9cb9d67387a0b40faeb SHA-256: 36a29a4a104d07d2a19e17a4ced57c5cb41392335ac14a27f3d4c9d39140d57f
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/pify?keyword=admiralty+law+in+india+pdf In PDF document text
    • https://site-1037864.mozfiles.com/files/1037864/61580174376.pdfIn PDF document text
    • https://site-1037044.mozfiles.com/files/1037044/zasojises.pdfIn PDF document text
    • https://site-1036640.mozfiles.com/files/1036640/42947915650.pdfIn PDF document text
    • https://site-1037914.mozfiles.com/files/1037914/gakujajojewe.pdfIn PDF document text
    • http://garizus.shoefactoryzone.com/uploads/1/3/0/8/130873782/xifodur.pdfIn PDF document text
    • http://files.napiercounselling.co.uk/uploads/1/3/0/7/130739537/3e003317776d82d.pdfIn PDF document text
    • http://pezol.romekiwanis.org/uploads/1/3/0/7/130738511/3794618.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/1/0433/6071/4907/files/3133119373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/9809/9878/files/84539581237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5552/5273/files/xemometotujajixiperiwamub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7659/4080/files/8156087876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6145/6279/files/the_dead_zone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7341/3028/files/what_makes_subsonic_ammo_quiet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4605/1744/files/citibank_mortgage_legal_department.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_off0000adbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADBD 5192 bytes
SHA-256: e4f8c1f2f106920dd43980c6af43bf3b356e339c47b53d613d3fbd0b97824c08
font_01_sfnt_off0000bf6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF6A 10140 bytes
SHA-256: ac764c8813b2f7a4ef4787643f19e30b8f7f1c34b439698adfa6216f8dee406a

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