Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c10134397a2866f…

MALICIOUS

PDF

58.1 KB Created: 2020-08-25 07:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96878634bb7c6f6c534a8596b5ff4b9e SHA-1: 9e01c7dad09af04394131bf1bdac73d4723e0e05 SHA-256: 0c10134397a2866f7be9b5174594220fd0c8be490bc6f3bb575fad2edc32cbf3
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to trick users into financial fraud. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the presence of malicious links indicates a phishing or scam attempt.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=bilanzierungsgrunds%25C3%25A4tze+%25C3%25BCbersicht+pdf
    • http://bilerosew.converseconserve.com/uploads/1/3/1/4/131437116/mosoja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4493/7628/files/48404889754.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3126/files/danulezuvuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/90124005259.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/fundamentals_of_nonparametric_bayesian_inference.pdf
    • https://cdn.shopify.com/s/files/1/0435/2815/9396/files/vifigu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/55158006145.pdf
    • https://cdn.shopify.com/s/files/1/0436/4517/3910/files/7740495369.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/pitejiwapifarubixalil.pdf
    • https://cdn.shopify.com/s/files/1/0435/8009/6667/files/the_american_republic_since_1877.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7190/files/animation_photoshop_action_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/19992837561.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/78360438584.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_off000091d2.bin
c4f8ca975abe6345be0a7198e84cb632b20644e99b491655de79638f9afea840		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91D2 6012 bytes
font_01_sfnt_off0000a56d.bin
09a7b6effac7a7fe29ad34e9f651446ca5842a9a3850a85daa25504eb61b41f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA56D 17388 bytes

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