Malicious PDF — malware analysis report

Static analysis result for SHA-256 065787b920d92fe6…

MALICIOUS

PDF

49.2 KB Created: 2020-07-23 14:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c450eb5e42379706a56b9856a67733e0 SHA-1: 10bdf6a727fd365d11dc42f284bddc775dddf7e0 SHA-256: 065787b920d92fe64b69685113c36eb98efe641bb10a92c7244e5f2880b464d8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to lure users to malicious sites, likely for phishing or to download further malware.

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.cc/pify?keyword=export+html+to+pdf.+net+core
    • http://files.laurenmmcollins.com/uploads/1/3/1/4/131406036/nogixizapidib_zezovumubuxefeg_wevusafadusa.pdf
    • http://files.shilohrussellville.org/uploads/1/3/2/7/132710783/3035071.pdf
    • http://files.canaanumc.com/uploads/1/3/2/6/132682862/d1deee5c7df1b45.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0342/8510/files/46103221494.pdf
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/72535412034.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3208/files/bexaxozu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nomevorijodasulalo.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/1482342332.pdf
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/42683287291.pdf
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/xuminaworugutobitajase.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/kiguxijifawegetopebodevu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/mumifunoxunow.pdf
    • https://cdn.shopify.com/s/files/1/0433/8375/0814/files/78099274120.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/natisinesulolab.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/texunefovad.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_off00008399.bin
43308593491a704d20c8d1db0540c9627611bba4d50e8c5e898e1248fca2b1ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x8399 4804 bytes
font_01_sfnt_off000093c7.bin
2d2c0bc2fd60c007bcebc9c3e8e21dbc1f31d57e1977cdeaee18029eb1acd7ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x93C7 10376 bytes