Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8612cb075f8bb60…

MALICIOUS

PDF

69.3 KB Created: 2020-11-19 14:55:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3bc8a4a7336dcd9cee3f556b9d764da5 SHA-1: e83a6fd4704cd1e05e579ffb10095c2be5dccab6 SHA-256: f8612cb075f8bb6019325b0c8d1031e29235ee0ca3df0813817ac61f46fc6b37
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous links designed to create a link farm, with a primary malicious redirector identified. The document body, though heavily obfuscated, appears to contain text related to 'Live net tv' and 'apkpure', suggesting a lure for potentially pirated software. The heuristic firings indicate the PDF links to known malicious redirector infrastructure and is flagged by an ML classifier as malicious, likely a phishing or trojan delivery attempt.

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?utm_term=live+net+tv+4.+7+apk+apkpure In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/9653445.pdfIn PDF document text
    • https://bijoxopibomer.weebly.com/uploads/1/3/4/3/134325560/xexemasijewub-vitajaweriwozo-mofeleri-vulejamuku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462736/normal_5fb3d8cbefc1d.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/d133361c-e244-4aac-8e29-219f191cd9a0/figopipusewadexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee1ac379-641e-43cc-8c16-c48862ec4da9/varinadilaxekaseki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e96d344f-7efb-43b7-8e6a-5075b7db845b/98979478798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4458ac49-5d87-494d-a906-d697fd844218/oracle_corporation_universal_serial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/992f8ed8-c303-460f-8e5c-bc1a2e0af906/21755915331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a258c05-1b5f-4972-b4f0-dd8cc9d13e71/microsoft_publisher_deneme_srm_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e14ddce-deca-423b-8cdd-84d57a82d080/raduvazikopuxuxulanaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28490a1b-0d2f-45b5-bf39-b86a81397fa7/changes_that_heal_by_henry_cloud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a799375f-4565-4609-85d5-f57944833b9b/70392518848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aa109e6-576e-4d45-8365-fcc4d2bcda92/9534028963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd59fd47-19a9-4a4c-97fc-4dda2c8d1cf7/67865792324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c39bf70f-d0c2-4733-b3f5-b45b68d7724f/xovavujag.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_off0000d378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD378 4868 bytes
SHA-256: d621fe61838983882aa5ce89f93cc7aae0eeba3adccfba2a00496da0e2747bc8
font_01_sfnt_off0000e436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE436 10672 bytes
SHA-256: 9379a11379fece1de10421bc909827b654b73f2b6551a122abe0acbc7e13f3b4