Malicious PDF — malware analysis report

Static analysis result for SHA-256 094d0b410e7a2282…

MALICIOUS

PDF

43.0 KB Created: 2020-07-09 21:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e15d2724ba9b666218aa2fbd72ab5126 SHA-1: 80afca7f46b452465c8b268d0431528e3447b686 SHA-256: 094d0b410e7a2282fc07f2d847ef072d29cf15beb423447c004b45471c8b8978
162 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, and is flagged by ML classifiers as malicious. The document body, though partially garbled, suggests a lure related to invoices or payments, aligning with the 'SE_INVOICE_LURE' heuristic. The presence of embedded links and the overall structure indicate an attempt to trick the user into navigating to malicious infrastructure, likely to download a secondary payload.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wb?keyword=time%20of%20supply%20under%20gst%20with%20example%20pdf
    • http://files.zip-dang.com/uploads/1/3/1/3/131383664/gadizubobowow_kufusu.pdf
    • http://files.mocommunitytrees.com/uploads/1/3/2/6/132680789/maruxewewate_gexaxojap_balobubibizewa_pidof.pdf
    • http://files.arlingtonmsband.com/uploads/1/3/1/6/131606087/ddee7.pdf
    • http://files.rhythmresearchresources.net/uploads/1/3/1/6/131606127/gelizoxi-mevep-xuzumifam.pdf
    • http://files.citylifeconstruction.com/uploads/1/3/1/8/131872178/4435579.pdf
    • http://files.ryleyskelton.com/uploads/1/3/0/8/130873895/2993677.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://nikiruweti.files.wordpress.com/2020/06/nenunujebuli.pdf
    • https://xojivus.files.wordpress.com/2020/06/65949039089.pdf
    • https://viditesu512119844.files.wordpress.com/2020/06/11330840531.pdf
    • https://vujodukiweda.files.wordpress.com/2020/07/xobifikewogobod.pdf
    • https://sukilokupul.files.wordpress.com/2020/07/zukoboziredemuzule.pdf
    • https://nojafuxotuz.files.wordpress.com/2020/07/sejajer.pdf
    • https://pubufifadako.files.wordpress.com/2020/06/pakimemunedokuxonekeweka.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulanevu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87932640634.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46905239833.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67295211500.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojedeteremedadedarovir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/podufa.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_off00006a7c.bin
82051bd4db66deb20d8dd4624ad7602906ec8e27b6265021c299685d4b354527		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7C 5548 bytes
font_01_sfnt_off00007d3e.bin
f405ad958bc47c7d4617ec2f239a534006337e9c26a8719138029b7ae9442e54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3E 9828 bytes

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