Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9e9f1165a58c9e…

MALICIOUS

PDF

43.8 KB Created: 2020-06-06 02:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 387d5aec4d59cbebbecbdade49b7e521 SHA-1: 9563510f32af57c88096ff0f9da328c8fb031e7e SHA-256: 3a9e9f1165a58c9e2aaeb495f11c333f745795064f868bb4909e881edcc66338
94 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 as a PDF link farm. The primary URL suggests a lure related to 'spring breakers' and 'putlockers', indicating a potential phishing or content distribution scheme. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent to redirect users to potentially harmful content.

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://christinafriedle.org/uploads/1/3/1/3/131379591/131379591.html#watch+spring+breakers+putlockers
    • http://cpanel.needahbasket.com/uploads/1/3/0/9/130969533/gemodafejugori_satodozodadolem_nuvutofimo.pdf
    • http://thrivenowtherapy.com/uploads/1/3/0/6/130605143/3999b2.pdf
    • http://alicania.co.uk/uploads/1/3/0/5/130550859/5279517.pdf
    • http://boshuster.com/uploads/1/3/1/4/131437766/sopemanodeseki.pdf
    • http://7gshouston.com/uploads/1/3/0/4/130476866/54b247c6.pdf
    • http://fxstudioshalloween.com/uploads/1/3/1/0/131070806/9078856.pdf
    • http://northerncoloradofarrier.com/uploads/1/3/0/8/130873740/e98a40908c9e7b.pdf
    • http://midnighttokerstore.com/uploads/1/3/1/4/131453869/efbebb5725623e4.pdf
    • http://moniquestam.nl/uploads/1/3/0/7/130739678/7933298.pdf
    • http://christinafriedle.org/uploads/1/3/1/3/131379591/terms.html
    • http://christinafriedle.org/uploads/1/3/1/3/131379591/dmca.html
    • http://christinafriedle.org/uploads/1/3/1/3/131379591/policy.html
    • https://mozovubebu.files.wordpress.com/2020/06/17889931227.pdf
    • https://gozinogix.files.wordpress.com/2020/06/sakorezerivufi.pdf
    • https://luperixul.files.wordpress.com/2020/06/fimawatanexivezudase.pdf
    • https://robesezidir.files.wordpress.com/2020/06/didawesod.pdf
    • https://pegarosume.files.wordpress.com/2020/06/12541823582.pdf
    • https://toxebep.files.wordpress.com/2020/06/godisasa.pdf
    • https://jabofape.files.wordpress.com/2020/06/76106800915.pdf
    • https://kolurinitof.files.wordpress.com/2020/06/votipifowapesixugelov.pdf
    • https://lelekeba.files.wordpress.com/2020/06/31567896454.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067b1.bin
e38940180946ac63f991fba17b8c56cbc43ce359afa573e4fbc5cf6aa18dbb30
pdf-font-stream PDF embedded font (sfnt) at offset 0x67B1 10572 bytes
font_01_sfnt_off00008c0d.bin
8b7ea71d15b792ad372da82bc8d527db59077d8e062475a791fd0933720b60aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0D 16536 bytes