Malicious PDF — malware analysis report

Static analysis result for SHA-256 60791a9c5d87500a…

MALICIOUS

PDF

42.8 KB Created: 2020-10-07 09:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2f280f7797c51af4b5b2723f9ae79b3b SHA-1: 098446b3d971ab6fb66489f9e08b0f1c5036a7e6 SHA-256: 60791a9c5d87500a4a41c143800b0bb757050fde42e2c81542067f7eb2092012
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/pify?keyword=ap+polycet+exam+fee+2020 In PDF document text
    • http://files.swimpristine.ca/uploads/1/3/1/3/131380619/6d7962e2d.pdfIn PDF document text
    • http://bagizim.jonathanmichaelcyrus.com/uploads/1/3/1/4/131453005/e500ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/17144dd0-1f4d-4397-84ae-f6edbb37e3c8/volux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ebf8433-874d-472e-b1fd-8ab7f10451d5/robigedapodafegosez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a0de918-ef0b-466b-a3fb-53c333bdf4b9/81836220655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2178/1160/files/87928202567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7039/7352/files/do_all_kingdoms_have_cell_walls.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0354/3715/files/nivutexenevira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7098/8196/files/71112246664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9535/9637/files/linkedin_learning_reviews_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9566/5056/files/nujur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9805/8141/files/27288171344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3682/6007/files/tie_your_mother_down_bass_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0960/7333/files/survival_life_hacks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0368/5275/files/rarawinakoxizar.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_off000068f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F0 5320 bytes
SHA-256: 09a8c477d03c7a071c2a4607a3f67a32a765de8136fd838e282a149a1a2bdd88
font_01_sfnt_off00007b13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B13 10312 bytes
SHA-256: 5a91f65b9ab7480acb337f3a42a7c37d00cf6e549e5eb0c190f50dff657f73d9

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