Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db489c0c63f0bd9…

MALICIOUS

PDF

58.5 KB Created: 2020-10-27 16:15:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06e8fbd42132fbc2ba529e1e1dcdb4cb SHA-1: 73144104fdb756db368d5b19e859b9d2099493ce SHA-256: 4db489c0c63f0bd954b67e87f76a8d99bea54fb0144b759bb28f8347ae182743
194 Risk Score

Malware Insights

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

This PDF document contains multiple embedded links, with one identified as a known malicious redirector. The document also includes a lure to copy/paste clipboard content into a shell, suggesting an attempt to trick the user into executing commands. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/strik?keyword=milwaukee+2663-20+review
    • https://cdn-cms.f-static.net/uploads/4413125/normal_5f976b5c888a6.pdf
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f87b9c090ca8.pdf
    • https://cdn-cms.f-static.net/uploads/4391921/normal_5f8e10233e2e4.pdf
    • https://wekegakusujesal.weebly.com/uploads/1/3/4/2/134266445/871f1270a35284f.pdf
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/dafujivilisig-jajetux.pdf
    • https://nuzixusimupe.weebly.com/uploads/1/3/4/3/134306281/nasigijo.pdf
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/miwawizuw.pdf
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/baxuvesot-nizavij.pdf
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/roxunosi.pdf
    • https://soxixafefude.weebly.com/uploads/1/3/4/4/134434462/efa29f8.pdf
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/tamuvikagiloxipa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/leguvefu/8388613033.pdf
    • https://s3.amazonaws.com/zetare/78211046531.pdf
    • https://s3.amazonaws.com/lomogas/cambridge_english_empower_pre-_intermediate.pdf
    • https://s3.amazonaws.com/punurum/xepilirinazewugo.pdf
    • https://s3.amazonaws.com/salosibejodod/simebivuwatologilafapor.pdf
    • https://cdn.shopify.com/s/files/1/0498/4402/7559/files/zatojudewutowamemobuveze.pdf
    • https://cdn.shopify.com/s/files/1/0488/2055/1845/files/s10_manual_transmission_removal.pdf
    • https://cdn.shopify.com/s/files/1/0497/5017/9999/files/deltarune_android_pt_br_download.pdf
    • https://cdn.shopify.com/s/files/1/0483/5724/5077/files/99093591031.pdf
    • https://uploads.strikinglycdn.com/files/5cefd076-de1d-4569-8be0-9a90d8b3d9ea/25145765598.pdf
    • https://uploads.strikinglycdn.com/files/63afb8da-7247-41a2-9efb-5901005fbf92/3231990992.pdf
    • https://uploads.strikinglycdn.com/files/0a1e2934-3a6f-4565-90b3-3d63a7ad958a/62406851309.pdf
    • https://uploads.strikinglycdn.com/files/b0b23668-dfd9-478d-9661-7bd42e7c2517/kupanijamizewejidifod.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008eba.bin
85a4f2ac9ca0eb0ef47712767c31527921f7f780d55bd1ffa56a536a46555dcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBA 5344 bytes
font_01_sfnt_off0000a117.bin
9d31055b367e9bb296d6f0c04f3118b659b9a1c5f4c591724765facc2d2fa1c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA117 11024 bytes
font_02_sfnt_off0000c6c7.bin
2732c78df68b4531e26da51a256f0f9ab881cb8a96d1886ade34872d88eeece3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C7 16140 bytes

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