Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c5c614c21fd327d…

MALICIOUS

PDF

45.0 KB Created: 2020-07-31 06:50:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6040cef487c6fc0f53f212d2ea5897b0 SHA-1: 569d600aadec9ff1f1648576159b4a68528d1876 SHA-256: 5c5c614c21fd327d7079ec95a32f5870f4424c46b3ee90001591c2e4a194193d
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, suggests a lure related to 'oracle database' administration, likely to entice users to click on the malicious links. The ML classifier strongly indicates maliciousness, and the presence of a redirector URL supports a phishing or malware distribution attack pattern.

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=oracle+database+12c+administration+workshop+ii+pdf
    • http://files.cyclingsportscenter.com/uploads/1/3/1/6/131637224/posomojanozosaf.pdf
    • http://files.northuistandgrimsayfcc.org/uploads/1/3/0/7/130775260/4105501.pdf
    • http://files.glamourgirlhandbags.com/uploads/1/3/1/3/131384401/c76d3ad.pdf
    • http://files.norwaynealumni.org/uploads/1/3/1/6/131606111/6ebef.pdf
    • http://files.globalcitymission.org/uploads/1/3/1/6/131637313/pusen-jiziz-govuwuri.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/fugedapu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/rugofuvigitomikakumivir.pdf
    • https://cdn.shopify.com/s/files/1/0439/0649/8728/files/masinurewodez.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1315/files/gadef.pdf
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/zisoxijiwigunojupopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3487/7847/files/5238072527.pdf
    • https://cdn.shopify.com/s/files/1/0434/9096/7714/files/65555748274.pdf
    • https://cdn.shopify.com/s/files/1/0431/5470/2496/files/61336157056.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/gagisibusuvonozituserab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdf
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/pojemepodavar.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/rovijitepujusezeva.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44329390643.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_off00006fb4.bin
b692ab95dd88df04b7642d2e23f8cb1bfb9417b223a64a1e646081e2f13f71ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB4 5688 bytes
font_01_sfnt_off000082ea.bin
8f9df04ce1420ffa14ba606fe35c9acfffe5dd108944198cf4ad3eb4289d7236		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82EA 10316 bytes

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