Malicious PDF — malware analysis report

Static analysis result for SHA-256 43cc7d89d8b36eb9…

MALICIOUS

PDF

49.6 KB Created: 2020-10-15 08:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2b0122da352e24555129acbbac554d8c SHA-1: 3a42ff60671ff2121a487dd037c1804cdd446af2 SHA-256: 43cc7d89d8b36eb9ede0fb78dbf507bac78e87d6be7e56012034a61a137524fb
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.link/pify?keyword=lep%2527s+world+1+apk+android+oyun+club In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rugatu-rugot.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/divili_dapixi.pdfIn PDF document text
    • https://site-1040437.mozfiles.com/files/1040437/joparuvotojifufitew.pdfIn PDF document text
    • https://site-1040681.mozfiles.com/files/1040681/52641703902.pdfIn PDF document text
    • https://site-1041939.mozfiles.com/files/1041939/monuxesezogiwasibafasax.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/e2ba55fd-292c-4ff0-8e6a-c77fa6f1f671/wezivazekikeviduxewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccf533d0-3620-4563-88a7-7f9960794a32/bafiwonojobelemepujax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d368f76-874d-4eb3-a062-c680b5884957/fimorojevuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0387/0884/files/collective_behavior_involves_action_that_often.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7035/7149/files/mitutiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/2274/6263/files/vagufepeneramonuterotezuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9139/2664/files/harbinger_corsair_down.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3421/3538/files/2794454727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6985/2833/files/micro_atx_cases_with_fans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/finuxovuboropukobimejujaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4996/5985/files/9426635285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/2226/6780/files/new_home_initial_walk_through_checklist.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_off000077aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77AA 5492 bytes
SHA-256: 2bf527f0e809c63dcc8dbcf77c2d462161072b181ea131ed4373e78a04a81136
font_01_sfnt_off00008a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7B 1924 bytes
SHA-256: 2ed00d5787f1f1ec079091f18b2c41a1e1cbf0360a4b8fa0bc985ef7417b77a1
font_02_sfnt_off000093a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93A5 10856 bytes
SHA-256: ac49efe75e3bcfed83bdc3a04142ab1f4d94b54d3beaaaf85e4475ab90f8fd3e

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