Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc0b8cc3183daf5…

MALICIOUS

PDF

66.6 KB Created: 2021-01-01 21:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e94fe58bf8f1abd24ab6487de2a46f48 SHA-1: 9bb42c7f315934cf7728fac0c524c79de6fdc9c5 SHA-256: 6fc0b8cc3183daf5fdfae453fa55085d1744b470bf2e8939e4752b4a6193c417
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, and is flagged by ClamAV as a phishing trojan. The primary URL, 'https://traffnew.ru/strik?utm_term=reborn+babies+that+look+real', suggests a lure to a malicious site. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of a phishing or scam attempt, likely leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffnew.ru/strik?utm_term=reborn+babies+that+look+real PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414852/normal_5fafde2c18aa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_5f8754463c80c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412999/normal_5fc509b16ed88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449769/normal_5fc797fb9d881.pdfIn PDF document text
    • https://sazojowob.weebly.com/uploads/1/3/4/3/134351878/5fea1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490936/normal_5fd7b4a5012f7.pdfIn PDF document text
    • https://tazabojadikeze.weebly.com/uploads/1/3/4/6/134648043/1317261.pdfIn PDF document text
    • https://zumukematil.weebly.com/uploads/1/3/4/7/134716366/tokurimudegedod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490949/normal_5fd0df7706e43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446287/normal_5fd1827b9a21c.pdfIn PDF document text
    • https://xasotuda.weebly.com/uploads/1/3/4/2/134235861/vipufurebozuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_5f927cf7f00af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464522/normal_5fad90864f768.pdfIn PDF document text
    • https://wopusuxosar.weebly.com/uploads/1/3/4/5/134583764/lutufejinane.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_off0000ca92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA92 4984 bytes
SHA-256: 085c927cc5a798ef3d86356fd4d3eb6303b7417182c87dc724508f3200bda5b1
font_01_sfnt_off0000db7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7C 10068 bytes
SHA-256: 6c7ec03bc95f048d7c6a52e3b0919d4c8e6f857ff529b295a69ce7690d6de069

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