Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab5eaeaba6f46730…

MALICIOUS

PDF

83.2 KB Created: 2020-11-25 19:37:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce6f0205d362d8dd2e785854603dbb1a SHA-1: d2e463094601a891400fd501c5d6a9a2ef2ff8f3 SHA-256: ab5eaeaba6f46730f5e7940eb08a9ce3f8ec796453a45fdb5f457e32414ce3e7
214 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of embedded URLs, many of which point to redirector infrastructure or link farms, suggesting an attempt to direct users to malicious sites. The document body, though heavily obfuscated, contains text related to 'one piece thong swimsuit plus size' and application metadata, which may serve as a lure.

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://traffmen.ru/strik?utm_term=one+piece+thong+swimsuit+plus+size
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5f989e44c8a8f.pdf
    • https://nakumupapetiz.weebly.com/uploads/1/3/2/7/132741615/bajutajuvuxilep-fexisag.pdf
    • https://cdn-cms.f-static.net/uploads/4380530/normal_5f95f80276f78.pdf
    • https://cdn-cms.f-static.net/uploads/4476924/normal_5fb6159194b52.pdf
    • https://cdn-cms.f-static.net/uploads/4416512/normal_5fa418b71cd8c.pdf
    • https://cdn-cms.f-static.net/uploads/4379473/normal_5fa9ead5b886f.pdf
    • https://cdn-cms.f-static.net/uploads/4425501/normal_5fa5b0ad752de.pdf
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f9f83ce2f198.pdf
    • https://cdn-cms.f-static.net/uploads/4368486/normal_5fb9971a50380.pdf
    • https://cdn-cms.f-static.net/uploads/4369665/normal_5f97a23e8bc0a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b3f54c5f-96eb-4139-a956-5d49a907baf3/gojigiwepufevaw.pdf
    • https://uploads.strikinglycdn.com/files/732c1004-0db1-4093-a0fb-dac4de9eff4a/stuffed_animal_repair_los_angeles.pdf
    • https://uploads.strikinglycdn.com/files/a2a55279-d2da-4da8-b739-f22289b409f8/36351023457.pdf
    • https://uploads.strikinglycdn.com/files/94cc21a6-5bf8-48c5-8576-5ba47a3ae518/jisabupoxuriromufuwoxit.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_off00010754.bin
74ca723b98de43bc89a0b407a106a834746dbb002bbd401fb802187013e1b0e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10754 5208 bytes
font_01_sfnt_off00011906.bin
e9943255730d9a1705172d5e64cdf3599298ffb8bb5620756314bda34ca704b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11906 11624 bytes

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