Malicious PDF — malware analysis report

Static analysis result for SHA-256 489090df1ed2f3f2…

MALICIOUS

PDF

34.4 KB Created: 2020-06-03 23:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: aad777c6a4c91ba8eb3d6e817de6be1d SHA-1: caf63a6c35044b485afe55029c1cc099df4ddac2 SHA-256: 489090df1ed2f3f2c587886ec1507e1edb7abf80c8410501b2d795624b1f4f00
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains references to "Treasure island questions and answer" and the authoring application "wkhtmltopdf", suggesting a lure. The primary purpose appears to be directing users to a network of linked PDF files hosted on various domains, likely for SEO manipulation or to serve as a landing page for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://addisonmoher.com/uploads/1/3/1/4/131453370/131453370.html#treasure+island+questions+and+answer PDF link annotation
    • http://mta-sts.ftsergioferreira.com/uploads/1/3/0/5/130551051/nopoxijefip-xubetoxirap-woregub-wavuxitewo.pdfIn PDF document text
    • http://cpanel.jagempowermentresources.com/uploads/1/3/1/1/131164456/3307102.pdfIn PDF document text
    • http://jimmyfitzpatrick.com/uploads/1/3/0/6/130620519/ruxoruzagako.pdfIn PDF document text
    • http://christmasmarketlacerdanya.com/uploads/1/3/0/9/130969565/3153381.pdfIn PDF document text
    • http://creatorsmatter.org/uploads/1/3/0/2/130291640/2047548.pdfIn PDF document text
    • http://mta-sts.hutchinson-cleaners.com/uploads/1/3/0/4/130475881/2a907ce.pdfIn PDF document text
    • http://addisonmoher.com/uploads/1/3/1/4/131453370/terms.htmlIn PDF document text
    • http://addisonmoher.com/uploads/1/3/1/4/131453370/dmca.htmlIn PDF document text
    • http://addisonmoher.com/uploads/1/3/1/4/131453370/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://basofiguk.files.wordpress.com/2020/06/94297935124.pdfIn PDF document text
    • https://duravav.files.wordpress.com/2020/06/xizotibodopo.pdfIn PDF document text
    • https://zarenorazer.files.wordpress.com/2020/06/pixezotoreji.pdfIn PDF document text
    • https://pevuwuke.files.wordpress.com/2020/06/fonojuwisemine.pdfIn PDF document text
    • https://borafitafule.files.wordpress.com/2020/06/65330940259.pdfIn PDF document text
    • https://nonuwivab179611077.files.wordpress.com/2020/06/19221294031.pdfIn PDF document text
    • https://mutemoxapeko.files.wordpress.com/2020/06/runusesojitabugenekimoma.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE2 10024 bytes
SHA-256: 4fac5c3fa22be5dac7b8adef34376ccbf3691bb3ebbe1f31f3c53c4e965238f4

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