Malicious PDF — malware analysis report

Static analysis result for SHA-256 55acfd46523a454c…

MALICIOUS

PDF

65.6 KB Created: 2020-12-23 19:26:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3467901629794549e1960f63ba726594 SHA-1: 1884b1d65701ab037b16acaa7e5579de6a089d5b SHA-256: 55acfd46523a454c193294187963971b7cf7af0e6758828a85994d05b8c2fd13
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The embedded links suggest an attempt to redirect users to phishing or malware download sites. While no scripts were extracted, the PDF structure and embedded URLs strongly indicate a malicious intent to lure users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=shooting+an+elephant+multiple+choice+questions+and+answers In PDF document text
    • https://fapezadedafax.weebly.com/uploads/1/3/4/6/134609176/d524aab3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417306/normal_5fc56a6a87130.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386347/normal_5fce5eda0cc97.pdfIn PDF document text
    • https://cdn.sqhk.co/weteroliwo/DtWn5hf/call_history_any_mobile_number.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_5fab0c4ff4184.pdfIn PDF document text
    • https://dupasaku.weebly.com/uploads/1/3/4/2/134235895/pulijoxitazalu.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/BFhbSdN/77923083507.pdfIn PDF document text
    • https://cdn.sqhk.co/tiruxugajo/ibGSLib/talking_dog_drug_commercial.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5f99de87911d1.pdfIn PDF document text
    • https://cdn.sqhk.co/mefomixut/AfjiiiK/kisuxejuvivogobemipowute.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/b9fa7e68-39fe-4c12-82bf-596e366f5ecc/systems_analysis_and_design_11th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2710bd9-870e-46a5-b2c5-a87c5c035b3d/what_is_an_example_of_disillusionment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56f83b18-8d77-4afb-9b46-759b14201eb6/bukipefipis.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/femafutakekigexexebigezel.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_off0000c2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F3 5808 bytes
SHA-256: b4eaa39fb22a29e67cbe077b32b51b0ed0e04d8dd539e73323685709a1424726
font_01_sfnt_off0000d69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69C 10132 bytes
SHA-256: d2ce0e8e51ec72f878653c60ab04a440ce60d14a4a0d49612983fe12fe438d22

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