Malicious PDF — malware analysis report

Static analysis result for SHA-256 31298cd5e71c4c7c…

MALICIOUS

PDF

61.0 KB Created: 2020-10-08 12:42:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 9414e18a224f60a07b71aca71ffbd9e5 SHA-1: 7a637c980e375a4bb5528dcf66ccc76ced4a6ab8 SHA-256: 31298cd5e71c4c7c6d5607abd77b9045bec3abb9f423754987999a00c9bcc3c1
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=elite+dangerous+ps4+guide+pdf In PDF document text
    • http://files.a-mfoundation.com/uploads/1/3/1/3/131383681/31a672edc36d.pdfIn PDF document text
    • http://files.moonlightweddingservice.com/uploads/1/3/0/8/130814043/4676666.pdfIn PDF document text
    • http://files.nakedgoatsoapco.com/uploads/1/3/2/8/132815791/popixotorab.pdfIn PDF document text
    • https://site-1037233.mozfiles.com/files/1037233/96509731179.pdfIn PDF document text
    • https://site-1037102.mozfiles.com/files/1037102/zemitapopelafajuwoxuw.pdfIn PDF document text
    • https://site-1037866.mozfiles.com/files/1037866/sivutefefij.pdfIn PDF document text
    • https://site-1038863.mozfiles.com/files/1038863/89721655624.pdfIn PDF document text
    • https://site-1038948.mozfiles.com/files/1038948/80730614880.pdfIn PDF document text
    • https://site-1039727.mozfiles.com/files/1039727/74767763938.pdfIn PDF document text
    • https://site-1039918.mozfiles.com/files/1039918/54583193498.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5381/7252/files/82732240634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3296/7830/files/words_that_begin_with_gl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4019/7794/files/soruxumuvupixetemap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2310/4160/files/gasugan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4809/8209/files/duc_phuc_truoc_phau_thuat.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA261 5136 bytes
SHA-256: f86784a89812fd0f1a0bbd5a8322f89e25cde8ebb7f6a5becb115c9dbc4f125c
font_01_sfnt_off0000b3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3EA 10720 bytes
SHA-256: cf01069801012e0a0d03aaf9461dd5c5ed264f242c1298b9a45c0f8f11232aef
font_02_sfnt_off0000d88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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