Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee02f30aa4414254…

MALICIOUS

PDF

75.3 KB Created: 2020-11-09 17:51:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0eb4b4b66a4a07c5325a979ef2343f9a SHA-1: d80715a386219cb949f8122031246a8a00ea3272 SHA-256: ee02f30aa44142543663ed103023e70e02401df5d8a1f4ea45c6d940e4a14385
214 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 ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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/aws?keyword=the+room+apk+data In PDF document text
    • https://rariborujur.weebly.com/uploads/1/3/4/4/134443596/lilopel.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/mizeteb/oracion_a_la_santa_cruz.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/19748481593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fff4c100-456b-4b6d-8bca-9efc0055849d/80667466678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e34ce0-7a63-4911-9a06-4835f28c5d4b/reading_comprehension_exercises_for_beginners_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4823159c-d226-48af-b2ff-dbfc2df2ec8d/36778811252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/271947f4-ac4c-46dd-990c-717de9bf1ac3/garth_brooks_double_live_25th_anniversary_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/massillon_cable_tv_channel_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95ffe0d2-bf36-475e-8b2e-74c4e20581b6/aaaaaa_aaa_aaaaaa_aa_aaa_aaaaaa.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/nafoporu.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/free_chilton_repair_manuals_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad100e15-8961-48d4-9364-02fba0fe8323/27152135805.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/tuition_incentive_program_nku.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001035d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1035D 18772 bytes
SHA-256: 9c351102458dc29d4fd743be7524718eaf93b11bf34c89931de688222e9e20d3
font_00_sfnt_off0000cf1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1D 5000 bytes
SHA-256: 45821476b89dfa6625c56555a4a700b5cf1fc951488cb33de9d4db8cb44cdf5e
font_01_sfnt_off0000dfec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEC 10344 bytes
SHA-256: 3be8a8ad47a94e0e5b88638e5b86f3de002138726be04adbcb064a01b8d4647b

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