Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb2c4ac76a37a7a…

MALICIOUS

PDF

75.3 KB Created: 2021-06-08 15:12:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2c272a184915e1e822d4cd22d6166681 SHA-1: 69a668b2c0742cea57fced0b122b9ba41795aec4 SHA-256: eeb2c4ac76a37a7ab4e2b66fdbc2260ec9ef96c24e79f350e2fbfdd00eee50cd
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, contains references to 'Facebook marketplace boise', suggesting a lure to redirect users to malicious sites. The presence of numerous external links indicates a link farm or redirection strategy, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://cructi.ru/pbw?utm_term=facebook+marketplace+boise PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369189/normal_603f35f59c36a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461232/normal_5fd73c0310d53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375342/normal_60be4585a4498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407789/normal_5fe9d37a4ff3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481831/normal_6011f5863039b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408709/normal_5fef90d76fc34.pdfIn PDF document text
    • https://kixakusafi.weebly.com/uploads/1/3/4/8/134891224/dakomogek-zamada.pdfIn PDF document text
    • https://vinezizonevo.weebly.com/uploads/1/3/4/3/134320549/pezogoxebitu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450041/normal_602a7a82d06b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414161/normal_60571b77329c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_603ad4e371669.pdfIn PDF document text
    • https://rozusuwiloguf.weebly.com/uploads/1/3/4/6/134644861/5c6a62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403676/normal_600f5b876e052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_6009e98f9166c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_60395abf49e58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377662/normal_6025821cb67ee.pdfIn PDF document text
    • https://weragekebikibu.weebly.com/uploads/1/3/4/6/134670115/gidexop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470389/normal_601dbbb32b364.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402720/normal_5fc88c4c7f36c.pdfIn PDF document text
    • https://zitolibozix.weebly.com/uploads/1/3/4/0/134040523/e916d6d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373769/normal_5fc70d3fd18aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496404/normal_602e6e562d378.pdfIn PDF document text
    • https://fiwibafufo.weebly.com/uploads/1/3/0/7/130774969/vomuj-dozezeru.pdfIn PDF document text
    • https://judozolu.weebly.com/uploads/1/3/1/4/131407514/1232029.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98D 5236 bytes
SHA-256: 0a5937d3d99ded1d1a30bbfae5b32909ad325b4abe566cd4ffac437b7e3552c6
font_01_sfnt_off0000fb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB45 10704 bytes
SHA-256: 0d32f6294b659c03988ba7360ecd2d80035ef39a162cbd751abd723ff886d864