Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bdbb582e5fc98b2…

MALICIOUS

PDF

66.8 KB Created: 2020-11-13 14:40:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0a414718f4dcdd412d293f195c59b1a7 SHA-1: 3aeb7b60d34199ec77075dbf091e5b9c9c14f4fb SHA-256: 7bdbb582e5fc98b2587fbc3f2c0bda3cdf8789187d818333067679aac1853e2b
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 a large number of embedded links, many of which point to disposable domains and redirectors, indicating a link farm designed to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging JavaScript for redirection.

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.
  • 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://gettraff.ru/123?utm_term=n+game+2+unblocked+current+lab In PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lukuxaluk.pdfIn PDF document text
    • https://retagavit.weebly.com/uploads/1/3/4/3/134363188/joniz_dekejoxogofas_gikaw_zadobibuduwoso.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/28fef585a7.pdfIn PDF document text
    • https://kirewigofe.weebly.com/uploads/1/3/4/3/134382955/birizirudadojux.pdfIn PDF document text
    • https://temegefa.weebly.com/uploads/1/3/4/5/134583031/93fec39f74.pdfIn PDF document text
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/jomukirenetalezatobi.pdfIn PDF document text
    • https://jumozavuna.weebly.com/uploads/1/3/4/5/134598597/1c6dc.pdfIn PDF document text
    • https://nuzilemuf.weebly.com/uploads/1/3/4/4/134479477/ripuxidin_sevezefa_rafame.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/xovobanukoxorob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/077e969b-ae32-4cd6-9b65-a6223be45476/lyrics_to_i_see_the_king_of_glory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3863e32-c847-4552-a16e-a1545e78461a/suwemobon.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/65378257544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adef6d26-0af6-4e78-b130-3749fd5e896b/kerepanobekab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8ed205-3eb0-4c56-935e-879dff6f0080/96137442673.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_off0000c7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AC 5388 bytes
SHA-256: 6849f5ecdf28222f2d7031f548df0b229291702ffac236bf53dcee84e02f9669
font_01_sfnt_off0000d9f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F1 10652 bytes
SHA-256: c0b41318a6a47b65b6a710c263953e492470399ca4b28cfa71f78b307371e711

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