Malicious PDF — malware analysis report

Static analysis result for SHA-256 05545a9d399ee432…

MALICIOUS

PDF

89.8 KB Created: 2020-11-04 21:05:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ff201da0faf05f5874d0862802701775 SHA-1: 3eb6313e1128e808434dc742cafe2c9618a77669 SHA-256: 05545a9d399ee4320842dec4eba6814ca2fb89504b75bdf684dd487fab58c6a0
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a lure related to 'Mario flash games unblocked' and embeds a URL that redirects to malicious infrastructure. This, combined with heuristics indicating an advance-fee scam and a link farm, suggests the document is designed to trick users into visiting a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://ttraff.me/123?keyword=mario+flash+games+unblocked+at+school In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f88af06803be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384839/normal_5f8faa30530d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368746/normal_5f8bab02bbdc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383572/normal_5f969353af3df.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/5305658.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/robumuduluwise/the_secret_to_attracting_money_joe_vitale.pdfIn PDF document text
    • https://s3.amazonaws.com/nepawigexa/canvas_mckinney_isd.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/39533778973.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/skyrim_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/tanidopozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e8e4341-9fe6-4858-b19c-3fac9c00cb63/inojin_yamanaka_x_reader_lemon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd9f0505-234d-4170-92c9-142d17ec985f/67168692838.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/wipadapil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94652cfa-01b5-433b-bca1-c06b81dc9ab4/31706381566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efaeb1d7-db5f-41b1-a9c7-0c75dac1f5ed/7197975990.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3557b2e2-22b9-4882-a984-06a3bd5127f8/manibafepazujixibu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11619 5524 bytes
SHA-256: 60f398b0196138194c3e80ddb143a2dcd8406154e9c6204b9b2707da3876fdc5
font_01_sfnt_off000128b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B9 10308 bytes
SHA-256: eff0a727dcbb12fcae86143f26772dd17a24a1251d6985c2f44f86eb4fa39ec0
font_02_sfnt_off00014bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BC6 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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