Malicious PDF — malware analysis report

Static analysis result for SHA-256 782fb1fe55a3813f…

MALICIOUS

PDF

46.5 KB Created: 2020-10-13 18:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 86949232376835a5684dd1c4ce875676 SHA-1: b7bf1a5c9f07451c7af04eba5b4d89b414066b64 SHA-256: 782fb1fe55a3813feb6d74e2c509f05a05d9778d8514f68d0cb3dd224ef6eeee
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://ggtraff.ru/strik?keyword=provident+fund+form+15g+pdf+download In PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/c2099e721b.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/vanojiraxajerubefiza.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nukunuraki.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/1/0440/7567/9896/files/73182369090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8266/2553/files/mod_apk_pixel_gun_3d_android_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7777/1162/files/jxd_509g_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f707da0-ae19-470f-8163-7fe84eeac5a9/kafasuvoraliviriwigav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c7c959b-8c8a-4b6d-a66b-02c5b0ed2fa1/fekiguwoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5248/4766/files/57801068416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9870/9917/files/genevogilefope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0860/4829/files/susulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3852/0997/files/watch_got_season_8_episode_4_reddit.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_off0000778b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x778B 5512 bytes
SHA-256: 2ee8b52f6704b8ef63f18c9078ffdfe8c7db99bec440abe0998039b922676c09
font_01_sfnt_off00008a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A55 10288 bytes
SHA-256: 6d61ccac6119dbfbdfcd9bb4c00a180bb57ab01bb0cf2f51b99bfddf45e40e1e

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