Malicious PDF — malware analysis report

Static analysis result for SHA-256 095e8bef95dd44ff…

MALICIOUS

PDF

39.9 KB Created: 2020-08-16 17:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0243f8fa98c7ae0758496a19ac77b93e SHA-1: bd2b9e8ca39282756eae6a5bc71c39f99115657f SHA-256: 095e8bef95dd44ff5a2c507512b1344d282da8e4ca57a89d86764d0f690960e0
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains references to 'Android one redmi note 4' and a URL that aligns with the malicious redirector, suggesting a phishing or scam lure. The ML classifier also strongly indicated maliciousness.

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://ttraff.com/pify?keyword=android+one+redmi+note+4
    • http://joduzole.rotarypointfortin.com/uploads/1/3/1/4/131407558/renixo.pdf
    • http://kugur.spiritofthe8thfire.com/uploads/1/3/1/4/131438137/movulax_mewuvovor_zoromi.pdf
    • http://bevarolu.hopefulbyhope.ca/uploads/1/3/0/8/130814328/7164490.pdf
    • http://pugumow.nikkiconstantine.com.au/uploads/1/3/0/7/130739197/0b83cad1a82.pdf
    • http://wubire.cardsforyourcause.net/uploads/1/3/1/4/131437532/vibedidijagar_zapakipixutan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8519/3621/files/jesalon.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7472/files/lajukidiwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5978/1538/files/noc_letter_format_for_bank_loan.pdf
    • https://cdn.shopify.com/s/files/1/0439/5896/0286/files/gofudon.pdf
    • https://cdn.shopify.com/s/files/1/0433/8280/0542/files/54192294304.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/caterpillar_3516_operation_and_maintenance_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pijajaza.pdf
    • https://cdn.shopify.com/s/files/1/0431/6934/9794/files/dojelebiverapizam.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/58613605589.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/active_voice_and_passive_voice_chart.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/kubevimuxuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9275/files/equidad_de_genero_en_el_peru.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006072.bin
1daf0d794e9daa849776f8a8501aefe114a41dfe2c394f2eddf18078f4cc4ad1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6072 4628 bytes
font_01_sfnt_off0000701b.bin
75828e9744273b62a106de99c945098233a9f815cd1d4de0fb252ca71a7ff7ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701B 10220 bytes

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