Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf526786b8073db…

MALICIOUS

PDF

38.6 KB Created: 2020-06-12 07:38:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: afad6aee9c490905dc4bb6a86e019a96 SHA-1: 21f2494bc0c734ccbae4ac80dfdd2a01ff46cf8d SHA-256: aaf526786b8073db8547d05d4372e9d28c845a593e84021e9dd24557c03f5f0e
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest a link farm or SEO abuse tactic, potentially leading to malicious content distribution or phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://slaten-wedding.rominastiebenphotography.com/uploads/1/3/0/6/130621401/130621401.html#datasheet+atmega16+pdf PDF link annotation
    • http://mswilliamsonline.com/uploads/1/3/0/7/130776795/3389615.pdfIn PDF document text
    • http://fortheloveofrose.com/uploads/1/3/0/3/130379370/46fdfebebd7d.pdfIn PDF document text
    • http://74-123-77-36.mgwnet.com/uploads/1/3/0/4/130436234/839e7.pdfIn PDF document text
    • http://thedaughtersofdissent.com/uploads/1/3/1/0/131071117/meborugeze-jujujidare-nomawejo-dowemisafapogu.pdfIn PDF document text
    • http://maillardreactions.com/uploads/1/3/0/6/130604699/8f29338075.pdfIn PDF document text
    • http://mail.whylifeministries.com/uploads/1/3/0/5/130589348/zivinofutuguropukov.pdfIn PDF document text
    • http://cpanel.grsymphonicband.org/uploads/1/3/1/4/131452880/b83f0fd30.pdfIn PDF document text
    • http://mta-sts.mx.jimjturner.com/uploads/1/3/0/2/130273790/felanatigewig.pdfIn PDF document text
    • http://ipmofwa.com/uploads/1/3/1/4/131453170/kuxid_mebuxunigimimu.pdfIn PDF document text
    • http://mail.wildernessfamilies.com/uploads/1/3/0/5/130588380/jilepixavum-komogajujofa-givotime-kizinepis.pdfIn PDF document text
    • http://univentapp.com/uploads/1/3/0/6/130620620/7312533.pdfIn PDF document text
    • http://coetani.com/uploads/1/3/1/4/131438707/wipivanuzosumefanob.pdfIn PDF document text
    • http://mjcontractor.se/uploads/1/2/9/6/129642953/129642953.html?ourIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://botojime.files.wordpress.com/2020/06/45295783888.pdfIn PDF document text
    • https://mabumuwilux.files.wordpress.com/2020/06/bejatipu.pdfIn PDF document text
    • https://kovimaj.files.wordpress.com/2020/06/vobotum.pdfIn PDF document text
    • https://bujavam.files.wordpress.com/2020/06/mixafelapi.pdfIn PDF document text
    • https://pavofozib.files.wordpress.com/2020/06/mapikubevafaxifokorobejev.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 6

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_off00006931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6931 10504 bytes
SHA-256: 21fb51c9fb02e9f5f7d1f8ec4dbd4aa5b156fe1b4e2efcf84b7699064e7d0ec5

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