Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de5f8d9bb3b2f62…

MALICIOUS

PDF

43.3 KB Created: 2020-09-01 13:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 202677b9abdbcfa01781a20cc1bec441 SHA-1: b5a2202cfbef155e3fa7ae98756f1a68c275855e SHA-256: 5de5f8d9bb3b2f6204f730f15342d609db4ae6af0183981d60a8e84bcdab141f
162 Risk Score

Malware Insights

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

The PDF contains a lure related to an 'SBI account form sample' and embeds a link to a known malicious redirector. The ML classifier strongly indicates maliciousness. Although no scripts were directly extracted, the PDF structure and embedded link suggest an attempt to redirect the user to a phishing or malware distribution site.

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.me/wix?keyword=sbi+account+form+sample
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0463/1825/6285/files/jofuwafoxadetinamawotuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/0872/8993/files/34842151121.pdf
    • https://cdn.shopify.com/s/files/1/0435/1547/8176/files/vovijexedowu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9715/1904/files/jean_baptiste_say.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/44731626136.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/deren.pdf
    • https://cdn.shopify.com/s/files/1/0432/0129/8594/files/36871631106.pdf
    • https://cdn.shopify.com/s/files/1/0461/8895/3751/files/82641899334.pdf
    • https://cdn.shopify.com/s/files/1/0434/5220/3161/files/fetobopomorozijar.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/navitadi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4363/5879/files/31386662302.pdf
    • https://cdn.shopify.com/s/files/1/0431/0227/3703/files/75421040958.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5366/files/89008141953.pdf
    • https://cdn.shopify.com/s/files/1/0430/8461/1733/files/79772694995.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f0e.bin
567cda3478c0921cbd8a3aace32e78de4b4047bc21ef067513bab7ae90d6ba1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0E 5288 bytes
font_01_sfnt_off000070dc.bin
ef70d92f18f16abdf62eef2e693ba5be8519c6729c27508523ca23753bc7351b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70DC 9840 bytes
font_02_sfnt_off00009283.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9283 4324 bytes

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