Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c60098117a815e8…

MALICIOUS

PDF

77.3 KB Created: 2020-11-11 05:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3269641d98f68a1230215df72cab65e0 SHA-1: 79f831c93a4e00e749ebba2154dfaadf735440d8 SHA-256: 5c60098117a815e825ed6014b500528996bae84beb1d1d7cd53146424b6555f3
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to suspicious domains and appear to be part of a link farm designed to manipulate search engine results. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains keywords related to license plates, suggesting a lure to direct users to malicious websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/strik?keyword=county+number+stickers+on+ohio+license+plates
    • https://cdn-cms.f-static.net/uploads/4403406/normal_5f9bd1ce8a551.pdf
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/1e8343.pdf
    • https://jugubiwujivivej.weebly.com/uploads/1/3/4/3/134352954/8631581.pdf
    • https://cdn-cms.f-static.net/uploads/4370264/normal_5f90d6367e575.pdf
    • https://vapesokon.weebly.com/uploads/1/3/4/3/134329795/fojasogemobawoma.pdf
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5f912ad499024.pdf
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/purogopijalu_fuwagakiketul.pdf
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/tuwofoxuzuritel.pdf
    • https://xazotanosiwe.weebly.com/uploads/1/3/4/3/134314219/e41134a73961.pdf
    • https://cdn-cms.f-static.net/uploads/4368732/normal_5f8a292ad31fe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/05e98470-2890-4d6e-97e6-8c559cf2cacb/befexifadozimeb.pdf
    • https://uploads.strikinglycdn.com/files/2f634bbc-e165-4202-8ee1-e46ff6216cb4/42640032246.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1e1.bin
cfd96fba1e7e23b9de9ba0acbc6b26d8ceb95256d905ae63543871319904eb60
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E1 5384 bytes
font_01_sfnt_off00010405.bin
1e8e78840bf93fd9e96e7f511c5bbe284fd36e501151c7213d10197ad06f2d7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10405 10836 bytes