Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b44fd6ed7c32ea…

MALICIOUS

PDF

279.2 KB Created: 2020-08-16 21:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a850a410237da8475a26421f7eb7dad8 SHA-1: 656abe1b25844e0d57a6e820ce9541612b51aa11 SHA-256: 72b44fd6ed7c32ea563188ede61ebce7c2b8e51c55f5e7f517ad9349b3be6f66
134 Risk Score

Malware Insights

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

The PDF document contains a lure for an advance-fee scam, presenting itself as a free novel download. It embeds a URL that redirects to known malicious infrastructure, indicating an attempt to deliver a malicious payload or redirect the user to a phishing site. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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=addicted+novel+pdf+free
    • http://files.titusvillesummertheater.com/uploads/1/3/2/7/132740405/xizimuma-nimufo.pdf
    • http://files.all4pawsdogrescue.com.au/uploads/1/3/1/4/131455883/9425829.pdf
    • http://files.ihrc3.com/uploads/1/3/1/3/131381241/d33a1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/1283/3959/files/temibiro.pdf
    • https://cdn.shopify.com/s/files/1/0430/7789/4297/files/chemical_engineering_interview_questions_and_answers_for_freshers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9013/3663/files/48035268377.pdf
    • https://cdn.shopify.com/s/files/1/0431/4316/8156/files/achievement_definition.pdf
    • https://cdn.shopify.com/s/files/1/0436/8865/7051/files/kavifexezedavik.pdf
    • https://cdn.shopify.com/s/files/1/0436/8911/5801/files/check_in_check_out_template_word.pdf
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/28665726077.pdf
    • https://cdn.shopify.com/s/files/1/0429/9997/1999/files/77649580310.pdf
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/9479422636.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_off00041a30.bin
0324a5e11434562352de2f73cc323b1cf85451d39e706ef7ae3ed4d4b4d94d80
pdf-font-stream PDF embedded font (sfnt) at offset 0x41A30 4808 bytes
font_01_sfnt_off00042aa2.bin
a2575f79d435250a922cc490fd0cae86475e81061fc9e28cc75e7b735eac1372
pdf-font-stream PDF embedded font (sfnt) at offset 0x42AA2 10156 bytes