Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a2d01841ad2fa0…

MALICIOUS

PDF

46.4 KB Created: 2020-03-29 05:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f2a1798c73b9d7da0298af44f5e92bc8 SHA-1: 71d681ca9031b5c82ce10e0842c02b8376d380a6 SHA-256: 03a2d01841ad2fa0e12e9bfd59867246c3a9e762e5a3e91e020d60740141a17d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a large number of external links to other PDF documents hosted on various domains. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malware or engage in phishing. The ML classifier strongly supports the malicious nature of this PDF.

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://ankezimmermann.ca/uploads/1/3/1/4/131438563/131438563.html#crimen+y+castigo+resumen+corto+por+capitulos
    • http://wangziyulekaihu.br3h.com/uploads/1/3/0/6/130604635/86806e.pdf
    • http://solvemytechproblem.com/uploads/1/3/0/3/130379227/nutiludegalu-duseliroju-milixotomele-favite.pdf
    • http://virobati.fr/uploads/1/3/0/7/130775825/totevoton.pdf
    • http://tidalwavesswim.com/uploads/1/3/0/7/130775952/51e5b16.pdf
    • http://aerosmithproduction.com/uploads/1/3/0/7/130738565/e842bc53252928.pdf
    • http://smartlets.org/uploads/1/3/0/3/130379237/nuwupurogunol.pdf
    • http://sylkris.com/uploads/1/3/0/8/130874265/a92770b0c83.pdf
    • http://downtownmemphiscommission.org/uploads/1/3/0/5/130539714/pewoba.pdf
    • http://deventermanueletherapie.nl/uploads/1/3/0/3/130324331/likadaxatinefol.pdf
    • http://kryanjenkins.com/uploads/1/3/0/7/130775294/afccb2.pdf
    • http://localhost.elkethoms.com/uploads/1/3/0/4/130494636/busetaba.pdf
    • http://ndishealthtoolkit.com/uploads/1/3/0/5/130540290/mekegu_riledanaseze_susosig.pdf
    • http://marybeads.com/uploads/1/3/1/1/131164234/kopokegofutevu.pdf
    • http://roccosansalone.com/uploads/1/3/0/6/130639764/darijifowigulizogoj.pdf
    • http://mail.gunsgreenhouse.org/uploads/1/3/0/6/130639270/2578143.pdf
    • http://runsheetapp.com/uploads/1/3/0/8/130813696/2978238.pdf
    • http://owngov.net/uploads/1/3/0/7/130738712/7940963.pdf
    • http://nh-dreamhomes.com/uploads/1/3/0/8/130874146/e785a0c10.pdf
    • http://dripexperience.com/uploads/1/3/0/7/130740065/b466c50ae2fb398.pdf
    • http://thepaintedvinecellar.com/uploads/1/3/0/6/130604878/soxifikal_zeveloku_warovefufalad_fujemopu.pdf
    • http://rainbowplaydk.com/uploads/1/3/0/4/130436096/3921979.pdf
    • http://www.ucalbums.net/uploads/1/3/0/7/130739833/duxuzodabu-memepuzil.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c7f.bin
c306f68c7b35f03a7a5cfa5c14ef4af9256bdc59589bf0e392e325f181a8f219		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7F 8044 bytes

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