Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da59af2589958b9…

MALICIOUS

PDF

47.5 KB Created: 2020-07-21 09:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c56abe2d0a28bb38ff41eae9fd8bd68d SHA-1: 126e30b853816a1607bd28f26c713fa3158f12e0 SHA-256: 0da59af2589958b9b9fc04749b3fbd82da30827a6c23cb1b6ffe79bd95a29b31
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The document body text, though garbled, suggests a lure related to educational worksheets.

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.
  • ClamAV: Pdf.Dropper.Agent-9525270-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9525270-0
  • 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.com/wb?keyword=compare%20and%20contrast%20worksheets%20for%20high%20school
    • http://files.nadi-haas.de/uploads/1/3/0/7/130775665/8586290.pdf
    • http://files.arnglobal.org/uploads/1/3/0/9/130969897/2b9b55659.pdf
    • http://files.aislingnaysmob.com/uploads/1/3/0/7/130775753/zexuwa.pdf
    • http://files.helpryansee.com/uploads/1/3/2/7/132740462/93de9eb2c5580b2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/masosuri.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/4646/9793/files/fewebibaw.pdf
    • https://zogolozavu.files.wordpress.com/2020/07/75303459734.pdf
    • https://newelav.files.wordpress.com/2020/06/xajeluwatiduwazogetokiti.pdf
    • https://tulitozesovo.files.wordpress.com/2020/07/nesejafakegale.pdf
    • https://cdn.shopify.com/s/files/1/0435/2344/0799/files/92534180461.pdf
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/98382427205.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99397771733.pdf
    • https://cdn.shopify.com/s/files/1/0431/1921/4756/files/53980025803.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdf
    • https://cdn.shopify.com/s/files/1/0429/5534/1977/files/52443456095.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/wefafiwogazofadipoxaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/wugifik.pdf
    • https://cdn.shopify.com/s/files/1/0432/0378/8960/files/34727065144.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_off00007b6b.bin
849987d79323c4dafeaa1c84d1265f4a83b0317976141c67ada73f4f8f7861e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6B 5536 bytes
font_01_sfnt_off00008e22.bin
080d6e5f72f53f119ebe0067d4b018c0b211e9a6846d5389134b556836a085f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E22 9884 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.