Malicious PDF — malware analysis report

Static analysis result for SHA-256 201ea3bd8edafb03…

MALICIOUS

PDF

47.9 KB Created: 2020-03-30 10:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 12311accbb42833a73f2b9769f59ae6f SHA-1: fe736d6412d4a9405b281a92f6d05614cdde498b SHA-256: 201ea3bd8edafb03aa4318f17ae62c4dcf5a9942113298bd9936ce8d48e3e4f2
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_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains the phrase 'Definicion de sigilo bancario' and several URLs, including one pointing to 'mymissblue.com'. The primary function appears to be directing users to a vast network of other PDF documents hosted across numerous domains, likely for malicious SEO or content distribution purposes. 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://mymissblue.com/uploads/1/3/0/8/130813478/130813478.html#definicion+de+sigilo+bancario
    • http://burkinabazar.com/uploads/1/3/0/3/130379210/2b10c1c961953b.pdf
    • http://aineglobalpartners.com/uploads/1/3/0/2/130270834/lugotefigiridone.pdf
    • http://rxtranparency.com/uploads/1/3/0/2/130273843/7749892.pdf
    • http://dreamdestinationtravels.net/uploads/1/3/0/2/130291786/dozuzotitu.pdf
    • http://fridaywebdesign.nl/uploads/1/3/0/6/130621575/kosagozitotoxavumi.pdf
    • http://karlynofficial.com/uploads/1/3/0/6/130639963/9e134b9a732de8.pdf
    • http://ruthmaryoshea.com/uploads/1/3/0/4/130476048/954936.pdf
    • http://patriotup.com/uploads/1/3/0/6/130604248/sijafinuxabujowe.pdf
    • http://gracefullygorgeous.team/uploads/1/3/0/4/130435637/3976471.pdf
    • http://mhbeans.com/uploads/1/3/0/6/130604349/4901104.pdf
    • http://pilanoentertainment.com/uploads/1/3/0/7/130739121/53980022f14.pdf
    • http://brindlebird.com/uploads/1/3/0/5/130551249/07681619.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_off00007ec0.bin
221e4bde3442671afc849a78f1c31ff4371459abd9f7ecce6ef72926c60b248b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC0 7388 bytes
font_01_sfnt_off00009baf.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BAF 16204 bytes

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