Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b932f17bf441495…

MALICIOUS

PDF

75.3 KB Created: 2020-12-18 05:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cce1c4ec58dfdeb9f60465a485f71f36 SHA-1: 95c578233ac9d34c0888f6e6d88c32923d7c80b7 SHA-256: 5b932f17bf4414953cbd4b5a67d944a85e3bd2eb0f69db09b9259d6b623afc5f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attempt to exploit users through deceptive content and external resource engagement.

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://trafffi.ru/123?utm_term=air+fryer+chimichanga+chutney+life PDF link annotation
    • https://rituvusuxokit.weebly.com/uploads/1/3/5/3/135300238/a50506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388416/normal_5f937fbf8710b.pdfIn PDF document text
    • https://vobudofokivelux.weebly.com/uploads/1/3/4/5/134599261/kogiforikafiros.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393511/normal_5fc4db9827cc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f99e5b40e8d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc67172bdb33045eee820f7/t/5fcad15b33fb14715cae0d40/1607127389646/dogelamagejevela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ab9d868-3903-4ea1-af02-d47b538395fb/8889235608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdaa3c2f-110c-4785-a0db-b66ee8c0a58c/mac_meaning_it.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/gafetiribejegoratenik.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/answer_love_myself_lyrics_bts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c4a9f5-57b7-4f03-9122-83048f2974d6/4747489622.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6846ad91-5a3d-4346-8bd1-c23b31e0d30b/fried_green_tomatoes_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e930cbf5-da4f-4136-a8eb-d11495389bad/sonic_generations_modding_discord.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_off0000e79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79B 5208 bytes
SHA-256: 6bfe64b743b57a6ff0631c8aff3d9c939fa776f499ddac28ff2e3212cb0bd505
font_01_sfnt_off0000f934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF934 11692 bytes
SHA-256: 52d39a11f77ae13a3c636e6c4f1ae6ff98d386f255c6d3d3eca54ad8d726a58f

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