Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fd3fd9fc33f7bdc…

MALICIOUS

PDF

69.9 KB Created: 2020-10-05 01:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2dd7c8fe2dc53392f1be9b2f6677c910 SHA-1: 66ae4d82bab62ddfb4f54a8e89c339821daec6f4 SHA-256: 2fd3fd9fc33f7bdc708e91c4dcb75f5f7cebe23d947fafaadea0b024e18c5de9
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://gettraff.ru/strik?keyword=chislehurst+and+sidcup+school+uniform+shop In PDF document text
    • http://files.nicksfamilyfitness.com/uploads/1/3/1/4/131406827/51e9220a.pdfIn PDF document text
    • http://jadof.shearbalancesalon.com/uploads/1/3/1/4/131452836/rowuj.pdfIn PDF document text
    • http://files.oncopods.com/uploads/1/3/0/9/130969220/tozelamuga.pdfIn PDF document text
    • https://site-1037204.mozfiles.com/files/1037204/29170576591.pdfIn PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/29285577430.pdfIn PDF document text
    • https://site-1037203.mozfiles.com/files/1037203/kitifebek.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/98419b2d-4196-42ce-b9d7-0dd9a8fca29e/4796836888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70baea13-26fa-4d9a-b6d0-aa7372598658/kusivivugarudunaxoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/127d1c6f-946f-4471-961d-00bf7b0d0d61/logigawemalesigaxife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bb96303-4533-429c-bc4c-ccd01a41c714/39179427394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6c1aae8-a44c-4a71-8678-dba3a52ac24c/mijusomusomawimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fece7c1-de83-4fd9-8ba9-66ead32f8880/porodusulesamanoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96552bf9-3507-4fdd-9e01-d2206b2e1691/pininatenik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c9e9d98-54d4-4fe1-b029-9cbca2bd5279/sewulepib.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_off0000c890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC890 5300 bytes
SHA-256: ff8be1352a9f69758a7ec3c8b0dfa90fcb8ee5190947cc375c499401c7484211
font_01_sfnt_off0000da61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA61 9880 bytes
SHA-256: 83d973e048e4b9130641916ac6644fb01493f8060c9094f58a24430f922f9964
font_02_sfnt_off0000fc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC27 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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