Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1183f77b7294f62…

MALICIOUS

PDF

46.8 KB Created: 2020-10-08 20:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 90cd7311891ed429d2508c1e1137d979 SHA-1: 3044753fca78074ea82a16f3a841351b6485d559 SHA-256: c1183f77b7294f62efe6c0d9896e5b9ba1e62251eb6a6c04c2693154b401e625
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.com/pify?keyword=pokemon+omega+red+rom+download In PDF document text
    • http://files.nwctahosa.org/uploads/1/3/1/0/131070572/kidasedezureves.pdfIn PDF document text
    • http://leniribej.sendlovewith.com/uploads/1/3/0/7/130740249/1c9d0028.pdfIn PDF document text
    • http://files.earsforyears.org/uploads/1/3/2/8/132814589/1631723.pdfIn PDF document text
    • https://site-1042981.mozfiles.com/files/1042981/zegilokiweredudij.pdfIn PDF document text
    • https://site-1039224.mozfiles.com/files/1039224/1899896878.pdfIn PDF document text
    • https://site-1037059.mozfiles.com/files/1037059/fizebotanunerusakufet.pdfIn PDF document text
    • https://site-1036926.mozfiles.com/files/1036926/fijapopaduganusew.pdfIn PDF document text
    • https://site-1036750.mozfiles.com/files/1036750/miwexegulomeromejujasomo.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/1/0484/1560/4904/files/91810892785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8899/3703/files/8142215331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/0414/6076/files/jiromisesogipasad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3249/7312/files/zesimozitenamunidov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7015/3113/files/10611630564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3991/1847/files/nikirutoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/willamette_hop_substitute.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE1 4784 bytes
SHA-256: 8ed0e0b5f03914f135980287edcef23bcedfd74b131e45ad13c0f148ad016ff9
font_01_sfnt_off00007c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0A 10588 bytes
SHA-256: 67cf7c2839ae0d22b625f093da3c6b6a9859cc0881df0313df2f91ff911c425c
font_02_sfnt_off00009ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FFE 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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