Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c16f84e82fc6c0…

MALICIOUS

PDF

67.1 KB Created: 2020-11-26 06:57:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e283a2010afb84f2c85023ec4a8d39d5 SHA-1: 271da72b55e2984321482e6e58ba8e9130f7b995 SHA-256: d1c16f84e82fc6c05f955e1b7ec6ab3f992775745e40f230376981697cd9f818
214 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, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://traffmen.ru/strik?utm_term=got+emilia+clarke+imdb', which is likely used to redirect users to further malicious content. The presence of a large number of external PDF links suggests a link farm, a common tactic for SEO poisoning or distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://traffmen.ru/strik?utm_term=got+emilia+clarke+imdb In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402710/normal_5fba2a3a1f972.pdfIn PDF document text
    • https://bujuwevirovumeg.weebly.com/uploads/1/3/4/2/134235487/jidusezilu.pdfIn PDF document text
    • https://xuwojuzo.weebly.com/uploads/1/3/4/4/134471705/d929b0dcc4b151a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393503/normal_5f8fa46f8a452.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/5330c506-dd4f-4cca-984f-4f092d4e25fd/retropie_save_state_hotkey.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/kodi_movie_apps_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/48325775780.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/vokeponesuwezimilul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7700995-ac10-4901-9d9d-51f4477005dc/35262359428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b22c21-588e-4994-bf53-3d313f345671/monsuno_3_sezon_trke_izle.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/xuwupaparopoju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66cc3aa5-6fff-469b-9a78-bb478500163f/kozefagonelome.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/conservation_of_mechanical_energy_worksheet_roller_coaster.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_off0000c905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC905 5144 bytes
SHA-256: f5b610da5f7f61778301b3355e8f8e036775405ce39ba1023797458ec285f20a
font_01_sfnt_off0000da6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6C 11072 bytes
SHA-256: a13733022a4e1f1b67130d0f551309223d72369ef9f0b746c10cbc7d673a38db

Open this report in the interactive analyzer, or submit your own file for analysis.