Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c54e5a72e005af…

MALICIOUS

PDF

68.8 KB Created: 2020-12-21 19:40:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cf96f0f6d5caa46d1b32c6e4c60edaf5 SHA-1: 9b6f484b1ba2a29d2a720e2546c3515e3a58ba51 SHA-256: 34c54e5a72e005af0dc4e6981a90d4e615544e1957b46e9e3b582a1556c57c66
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely to manipulate search engine results or direct users to malicious sites. The presence of embedded URLs further supports this, with one notable URL being https://traffine.ru/strik?utm_term=ninja+air+fryer+grilled+cheese.

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://traffine.ru/strik?utm_term=ninja+air+fryer+grilled+cheese PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370273/normal_5f9ac7f1e8611.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366000/normal_5fcbf10bdc129.pdfIn PDF document text
    • https://dagevonedil.weebly.com/uploads/1/3/4/7/134736192/wuvan_reruxomupota_nizeziwax_rojubotisikezo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383561/normal_5f8c16021881c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jofunoje/ct_lottery_post_results_post.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3d8d31452f90b7ff7981f/t/5fc5d7a74e98326c02db838b/1606801330700/stubhub_bucks_bulls.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf0d4c7d46c3615fb05a19/t/5fd1ad9bef89ac6683747e37/1607576988425/ribaxekemirilasalis.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/20079261400.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/banner_maker_pro_free_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/lodimirabifinamilugamixe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc718b7f784ea51367e45c4/t/5fd70a73d654060362df69c2/1607928436223/receipt_template_word_doc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdecdfaf67c863bcd17ac41/t/5fdf4bee463d3b6c6f4652b6/1608469487305/xifijolasadatinalidupegab.pdfIn 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_off0000cf0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0D 5428 bytes
SHA-256: 9323c5110736ebe4d938ad252ad501abe3181bd7736b1afc76027492b3481032
font_01_sfnt_off0000e199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE199 10792 bytes
SHA-256: 0bba642d28af5d4a7daf51e04d098760d9a7a8c286e208d11ba27dbf59528cd7

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