Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a66b6ca28057c9…

MALICIOUS

PDF

67.9 KB Created: 2020-11-11 20:43:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ec8fad2c4581e022cb5a9413e684c3af SHA-1: 8eb808862f7d61042158a2850a2ed40573f59d00 SHA-256: f1a66b6ca28057c98ad19a8d6695a318e77faf907fb3f5821d2d43760a59dea4
184 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links pointing to potentially malicious redirector infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier also flagged this PDF with a high score. The embedded content, though heavily obfuscated, appears to be a lure related to 'waploft movies hd bollywood', suggesting a phishing or scam attempt. No scripts were extracted, but the primary attack pattern involves directing users to external, untrusted URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://traffine.ru/aws?utm_term=waploft+movies++hd+bollywood In PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/a1d0b0c.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/ab3a255eda76954.pdfIn PDF document text
    • https://fujubonutebi.weebly.com/uploads/1/3/4/2/134266124/9462617.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458161/normal_5fa6826730385.pdfIn PDF document text
    • https://totobulamu.weebly.com/uploads/1/3/4/3/134310137/minas.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/suwererixok.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/mavuxava-liwopomituxivof.pdfIn PDF document text
    • https://kepubaxolawava.weebly.com/uploads/1/3/4/7/134703856/foropagenotifos_fojevujovuxu.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/8a75607e-82a6-4be2-ab6d-6dcb1e978511/tenoluvuzasafili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9466b95-aec0-4911-9a81-9e067bc7dd09/clockwork_danny_phantom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f043895-d9bb-4a15-ba03-9ee96bbd37a2/29097371469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd887092-a73f-4010-a9d6-26539276f06a/pepupowazakurodik.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_off0000c982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC982 5592 bytes
SHA-256: cd32293a846117e4f6bc7bebe4bc527bb63939cef132bbe114afc2465f43e9dd
font_01_sfnt_off0000dc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7D 10824 bytes
SHA-256: 1418018eb35d4e0477881473c39be7bd34291a0422ab9c8d94a5aba32b83e8b1

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