Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8baa84baf494e2c…

MALICIOUS

PDF

70.7 KB Created: 2020-11-13 00:04:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 06fde7e62ce4eeecfe9ad15278a0fc43 SHA-1: 209d2686f86ab244650ef8471938bac2da6ab262 SHA-256: c8baa84baf494e2c258f4dfeb68df7449ae1ada00792ea0e1e6c19b45de04b7a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm or phishing lure. The primary URL, https://trafftec.ru/strik?utm_term=skade+the+last+kingdom+actress, is likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/strik?utm_term=skade+the+last+kingdom+actress PDF link annotation
    • https://simisidexibasu.weebly.com/uploads/1/3/4/5/134502995/7877345.pdfIn PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/gujuwosoto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387050/normal_5faa5dd0d7e92.pdfIn PDF document text
    • https://jomimufigaz.weebly.com/uploads/1/3/4/3/134319247/tezebov_kigagapine_kinajemapi_wuvoxevigupipu.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/817e7.pdfIn PDF document text
    • https://leputixoted.weebly.com/uploads/1/3/2/6/132683438/wutakaminumu.pdfIn PDF document text
    • https://foxegakadop.weebly.com/uploads/1/3/4/3/134337736/tiravunowuwal.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/78f41c43-9c5f-4691-aee2-cf838090e86b/91252493428.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/florida_contractors_manual_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/los_metodos_de_investigacion_social.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f81650-1a18-4d9b-ba62-6b301206ce5f/skeleton_key_photography.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/15531784766.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c443840e-7f37-4baf-8fbb-42ebf51b1076/char_broil_big_easy_grill_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/bokavakufumugifuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f8776d1-d5f4-4c5a-b3ac-4faddf1d9129/zappos_vip_issues.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_off0000d541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD541 5520 bytes
SHA-256: a0aefc1e9cfaa802b53db3c281f2a37d4a5ee0a739681afdebb3154d4f9eed03
font_01_sfnt_off0000e7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DC 11168 bytes
SHA-256: ee09f9dad1ba76b4947f17a0e38f45c05d33132f340cd71e1c5a43d57583cbe4

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