Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bda1c8b81b36990…

MALICIOUS

PDF

64.8 KB Created: 2021-01-10 03:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1e1544f04581077dc863d21142709e07 SHA-1: 8efbe422e0c7b305ec70e8be693fff0e1e7c37fa SHA-256: 2bda1c8b81b36990c92f9cdf823171a30eae64c11eb2c55c60e9bca6eccfaff1
252 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains numerous embedded links, many of which point to link farms and redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external links suggests an attempt to direct the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?utm_term=aastha+movie+mp4 In PDF document text
    • https://site-1177706.mozfiles.com/files/1177706/54132167806.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_5f9bfc9938828.pdfIn PDF document text
    • https://gotugutulado.weebly.com/uploads/1/3/4/6/134648793/lokaf.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/Rbjozjg/balenciaga_bag_strap.pdfIn PDF document text
    • https://site-1178831.mozfiles.com/files/1178831/71067456291.pdfIn PDF document text
    • https://gejomomik.weebly.com/uploads/1/3/4/7/134719116/6402313.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374682/normal_5fe5b8a6d4d9f.pdfIn PDF document text
    • https://puxamosawakexa.weebly.com/uploads/1/3/1/3/131381243/vavimawujan_puziwavegizaz.pdfIn PDF document text
    • https://dodafuwunolig.weebly.com/uploads/1/3/4/0/134016835/f7fe6.pdfIn PDF document text
    • https://defifipak.weebly.com/uploads/1/3/4/4/134442047/a13a5.pdfIn PDF document text
    • https://kojulijorivo.weebly.com/uploads/1/3/4/3/134329781/warezuzopezunofe.pdfIn PDF document text
    • https://maxifabosogup.weebly.com/uploads/1/3/4/5/134526580/c214421ef4644.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/voxipanovigepiv/foggy_nelson_endgame.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/mesoamerican_civilizations_worksheet_answers.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_off0000bf5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5D 5068 bytes
SHA-256: 3bdbbf6b5dd7b8fc3068fb57088730ccddcc3e994d440e79dfec26245c5f88a4
font_01_sfnt_off0000d085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD085 10928 bytes
SHA-256: f26a8ced04f730b10acf25dc2ff0e985ae9979a1b3daea0de247f79c9ea4b938

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