Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea2cc3232a5ed84…

MALICIOUS

PDF

64.7 KB Created: 2020-12-17 18:59:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3440c663f050f21ebf2fce30014635c5 SHA-1: f34aff47d6d3597f8d1614c9ea0b6ecfd5655ec2 SHA-256: 4ea2cc3232a5ed842598c5eec35942dc6db15d89b426cb7f07f63019e907b44f
234 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains multiple embedded links, with one identified as a malicious redirector. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, consistent with phishing or tech-support scams. The presence of embedded URLs and the ML classification strongly suggest malicious intent, likely to direct users to malicious infrastructure.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/123?utm_term=baldwin+state+prison+covid In PDF document text
    • https://fafugugopogewip.weebly.com/uploads/1/3/4/4/134464831/bitinu_wusuvukovox_vuwulixab_netun.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/a9eb5bd9-f978-4809-903c-3a6b954af218/novakezamet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d74b5bf3-3172-4b80-9569-2c1f699ec56d/12478799266.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cf44e5c7695ca99b2c1d/t/5fc996282f5dbb44b774cfe5/1607046698328/youtube_vr_oculus_quest_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35dd5cfe-587c-4e1f-a65a-b74e191cdb72/45274836606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56fa60ea-5d1e-458d-a076-e3589a74e6cc/rimoniwijimigufawiwola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d2bd11-28aa-4d89-8db0-10131605253f/xoxowa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce66d0f1fc5b0afdab7e3f/t/5fd21d08a9eaf43bd85c9bbc/1607605512990/mirozopelelonujag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e3e8fe6-2a98-4aa8-a145-c1af6a0a3b63/56495107608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51ea58fc-ce94-4d0f-8cbd-5f12e30dd07a/38130301801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dce5206-d699-407b-ac28-bc468f7b3c80/57686472752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d65f2bf1-bdca-4ac7-8f35-08a3c8bfa8d7/brooklawn_middle_school_basketball.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_off0000c191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC191 5268 bytes
SHA-256: 0bc4d9d8047efa8f26fe00151fbc33be4ad6cfe0d2b2c57641792ae78eb22d17
font_01_sfnt_off0000d39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39F 10468 bytes
SHA-256: e5ebc62b488bb35fa6232b0682606e6b4e50b33a0507bdbe855027c80eb65695

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