Malicious PDF — malware analysis report

Static analysis result for SHA-256 af0441742e90b463…

MALICIOUS

PDF

71.1 KB Created: 2020-11-22 20:49:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c7847f5339b999bd89a8252f98191435 SHA-1: 85574961f958bc940b952c6aa96befbfa7bfdd86 SHA-256: af0441742e90b46393637743af5faf1f44761ab16458ac6b2b1c3e923903d736
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded links, identified as a link farm, with several pointing to known malicious redirectors. The document body, though heavily obfuscated, includes text related to "Chameleon 360 igaming platform", suggesting a lure. The presence of ClamAV and ML detections further supports its malicious nature, likely serving as a phishing or redirection tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=chameleon+360+igaming+platform In PDF document text
    • https://telisawe.weebly.com/uploads/1/3/4/4/134466193/kogolijunu.pdfIn PDF document text
    • https://lejonajij.weebly.com/uploads/1/3/4/6/134651266/rolapigije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413374/normal_5fb8d7e1710b7.pdfIn PDF document text
    • https://rasuzumiketasak.weebly.com/uploads/1/3/4/3/134393825/6940207.pdfIn PDF document text
    • https://vavapeta.weebly.com/uploads/1/3/4/8/134848771/e7693121926.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/24f3b77f4ce8.pdfIn PDF document text
    • https://dasujodiket.weebly.com/uploads/1/3/4/4/134481559/bokowepoxide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f87c6382a1ee.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/7f43a85b-ec39-44ed-857a-e171d4f9e57f/bemuzagozulona.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/219745500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/225ef6f5-e2d6-4d88-b4c6-9d3e97a70ae3/trap_spotter_pathfinder.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/konversi_file_ke_excel_online.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_off0000cc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1F 5408 bytes
SHA-256: 18be02f212f81e272b86201c9e3ab05b5b295d67b1cf123782383d0f5f54ff7d
font_01_sfnt_off0000de5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5A 10272 bytes
SHA-256: 8d64f72da1cd57fbf8f100cceeec0490e00aed7c2b67277153765fe28275ab7f
font_02_sfnt_off0001017f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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