Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f3888cc449706f…

MALICIOUS

PDF

43.9 KB Created: 2020-10-25 15:33:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2fee134bf9e9844ca21ff0c4ff2fd24f SHA-1: 2586f372cc9043777279f681a2d350e676e80284 SHA-256: 07f3888cc449706f5f85234b5632f7e3f246ee38afb66e2d670041dececc63e8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, also contains the malicious URL. This suggests the file is designed to lure users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ggtraff.ru/123?keyword=amino+acid+pool+pdf In PDF document text
    • https://tuvozejuwubox.weebly.com/uploads/1/3/4/3/134323710/lozugenutafil.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/vuranudizol.pdfIn PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/5302379.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/vujoj_fidud.pdfIn PDF document text
    • https://bigogewoxof.weebly.com/uploads/1/3/0/7/130739615/xatal-xulen-dafube.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/fazebumuxozamez.pdfIn PDF document text
    • https://dajapofijakaf.weebly.com/uploads/1/3/4/2/134266914/468797.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3866/1534/files/physical_vs_chemical_properties_and_changes_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6694/5447/files/progress_bar_in_fragment_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3173/5715/files/5th_grade_math_worksheets_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1257/3344/files/present_continuous_tense_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/45903793.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/loguguvej.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/sasibumurekamidipir.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/waste_management_project_proposal.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/tedowipululenurebazanu.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/movevevodudijamavubifijiv.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/bozarekadebejow.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/memux.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/mahabharata_amar_chitra_katha_malayalam.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_off00006e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E74 5016 bytes
SHA-256: f8b6d279fd70a6171f7293b4585c1d5ee0b4d1b7076d03baedde1e4d0e20106a
font_01_sfnt_off00007f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6F 10412 bytes
SHA-256: 1b8a0d89d5a78eef030c40f57e4ca0c00dffb51e47acf4a5523f76a718b07e4e

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