Malicious PDF — malware analysis report

Static analysis result for SHA-256 30230aeca18fe25a…

MALICIOUS

PDF

67.2 KB Created: 2020-11-19 08:35:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75e5eff6205286667d714ea14a8e30ba SHA-1: 4932a6efb14aceedd8de56f2cc25811d9e76b716 SHA-256: 30230aeca18fe25a5990a857c95b624bd01fabb7164d519661738117ebba6589
234 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a large number of external PDF links, suggesting a link farm for SEO manipulation or malware distribution. The document body, though heavily obfuscated, contains references to 'Collier county sheriff active warrants', a common lure for phishing or scam operations. The presence of embedded URLs and the ML classifier's high confidence score further support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ggtraff.ru/123?utm_term=collier+county+sheriff+active+warrants
    • https://dajetulanew.weebly.com/uploads/1/3/4/3/134309067/5119060.pdf
    • https://cdn-cms.f-static.net/uploads/4389801/normal_5fa95739b3bbf.pdf
    • https://cdn-cms.f-static.net/uploads/4481819/normal_5fb2ba292378a.pdf
    • https://cdn-cms.f-static.net/uploads/4463005/normal_5fa5522bf151a.pdf
    • https://tokemenar.weebly.com/uploads/1/3/4/3/134337898/bc675c1382f.pdf
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f87db594e8b9.pdf
    • https://sonujesenusa.weebly.com/uploads/1/3/4/3/134344018/liragadovilomug_dedaxinabivoxef_vetigekorito_didunuziva.pdf
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f876f25b2113.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dfb57c5b-d71f-4b7e-aa42-dd095882c4b6/pisixogapebikufeba.pdf
    • https://uploads.strikinglycdn.com/files/7b339819-8b8a-4324-861e-222f6f1fdbe0/lennox_gas_furnace_troubleshooting_guide.pdf
    • https://uploads.strikinglycdn.com/files/54840b09-c4f6-4e4d-8147-675a331c7974/next_summer_olympics_2020.pdf
    • https://uploads.strikinglycdn.com/files/6039710d-0f16-4119-acff-8cf1cf764a1d/92750635554.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_off0000ca04.bin
a0d1f6940a81d6823232906bfc57d2a2232d5403921911e18fc4428516df82aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA04 5128 bytes
font_01_sfnt_off0000db8b.bin
38e25d999c6add0c50039784025a210f902e7f0bff97096787be40e105558b0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8B 10656 bytes

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