Malicious PDF — malware analysis report

Static analysis result for SHA-256 542f6a4894128a7e…

MALICIOUS

PDF

63.6 KB Created: 2020-11-10 00:58:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 5eeb8e1fcf538ca35b3a4dec02505fe3 SHA-1: 435ea45cf5094283031689fe4bb5ecfbf4aa8ff5 SHA-256: 542f6a4894128a7e1b07f3803bc8fbc7cee72c05655a93a856e05fbcfe7a20f7
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/aws?keyword=realtek+alc892+driver+download In PDF document text
    • https://daxuregivav.weebly.com/uploads/1/3/4/4/134431970/xekinaguru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381551/normal_5f914c214f37c.pdfIn PDF document text
    • https://papekukikaduli.weebly.com/uploads/1/3/4/3/134361343/kuvudojo.pdfIn PDF document text
    • https://rirusiwox.weebly.com/uploads/1/3/4/2/134265342/2478420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386092/normal_5f991ecd1116e.pdfIn PDF document text
    • https://zemodeviwiteg.weebly.com/uploads/1/3/4/3/134351550/4707353.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/ee2664.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/3c4e100c-3e6f-49cc-99ff-7f926a4ec27a/gas_mileage_on_a_2018_nissan_pathfinder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fedba368-fad9-4999-b072-62ee600ef90e/wuxapiganerulorumefudat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d78c04a1-e236-46e5-8a3a-97be4760e724/vazobere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f3b5dcf-3b44-4b83-8752-ee4c467c11ce/36298380158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e5b7b49-6ff9-48be-9005-04384c68b1b0/2569898207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60d2e934-2e16-4639-ab0d-ae200971977e/fososidokuzopamuroboguw.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_off0000bbc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC2 5460 bytes
SHA-256: 1e6fc5cb934f59e5c432bbb51e3a2f266dc9107a0af00cf2c793661a1c694fbf
font_01_sfnt_off0000ce7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE7E 10236 bytes
SHA-256: dbf32d9d001c07e4f0d024565c34169fd2e9732dda84449edcc317f668c15a7d

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