Malicious PDF — malware analysis report

Static analysis result for SHA-256 646cd2de98b7c896…

MALICIOUS

PDF

46.5 KB Created: 2020-10-08 14:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a1a3531a50f8e905b86a6dc83071e379 SHA-1: f1f380e37e96c107682111b655ebf334fb94c5d5 SHA-256: 646cd2de98b7c896e4a3151439d9b7a495c50bc79dc37f21df796c1dd61b7889
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/pify?keyword=dell+laptop+hard+drive+adapter In PDF document text
    • https://site-1043769.mozfiles.com/files/1043769/bimagag.pdfIn PDF document text
    • https://site-1041765.mozfiles.com/files/1041765/vorowidofozus.pdfIn PDF document text
    • https://site-1037240.mozfiles.com/files/1037240/66446496552.pdfIn PDF document text
    • http://geparu.dyncps.org/uploads/1/3/0/7/130775045/bunufu_xujigaligaru_palazogexasa.pdfIn PDF document text
    • http://files.bg-osteopaths.co.uk/uploads/1/3/0/7/130740536/nimakexogufemo.pdfIn PDF document text
    • http://files.luminoushealingtouch.com/uploads/1/3/1/4/131454771/7755939.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://uploads.strikinglycdn.com/files/2f2d0ee0-5c57-4fef-9080-eca1d20a65a3/nuvoweselebitaduwer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3684ca1-e7cc-4957-93cf-08da2399a21f/52459575019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d703a705-2354-4f8a-b77b-8b77db6319e7/puvawivulogopixobakevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/531c8159-66aa-4b72-93cb-9a5d1da2fd63/xogusimanirijesapara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eb329da-67b4-4067-a10c-97d3276e64f6/11339973271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53d8901d-3f57-4cff-aaca-2a3f1fef2498/48122703114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2668a4fc-2f1a-479b-9681-5f85bdbca5ab/xutatulepudamave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b9eb9b6-3d6d-4d7c-85a1-dc2cee6d8d63/55523179274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c68c966-422d-4b93-9fd4-24ff0016b3b7/29879749276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3582f6c-9264-4069-a33e-334123ddec4c/meruxorigumewo.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_off00006c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C56 4612 bytes
SHA-256: e549ab55e0bcda4f69c6d8e193f8619d9f4d58fae5e4c9f930af6a88434df4f3
font_01_sfnt_off00007c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1D 10288 bytes
SHA-256: 8d7ab4537ab3b62bb49adee9084ca7b6c0beffd4add3cde30fc820448d850291
font_02_sfnt_off00009f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F1F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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