Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eb4fa12096f27b1…

MALICIOUS

PDF

44.2 KB Created: 2020-03-24 15:43:02 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2b4432f9a18e31da37362b8d9614101c SHA-1: e8c98536d4e8bd8d71e0b7471e185118ddfc2614 SHA-256: 3eb4fa12096f27b16b1b4a321270b014ede221f4bacb51c663f0b37c3638f56c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, limiting the ability to determine specific payload delivery or execution methods.

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://fairytaletraders.com/uploads/1/3/0/6/130604026/130604026.html#derecho+romano+concepto+servidumbre
    • http://therapiesbymark.com/uploads/1/3/0/7/130738911/4713088.pdf
    • http://diorsbusiness.com/uploads/1/3/0/6/130620745/838124.pdf
    • http://portal.erjurself.com/uploads/1/3/0/3/130379292/30829cdee8d6f1.pdf
    • http://haoisinternational.com/uploads/1/3/0/3/130323175/9004863.pdf
    • http://techlet.ca/uploads/1/3/0/3/130323156/cb9b24564.pdf
    • http://www.gaiacandles.com/uploads/1/3/0/7/130738646/18257be6edf455e.pdf
    • http://www.where-is-melanie.com/uploads/1/3/0/6/130639123/lukumewabi.pdf
    • http://www.theviralistpath.com/uploads/1/3/0/7/130776449/pataxotaduko-vubop-zutusaz-ziparisa.pdf
    • http://solit.studio/uploads/1/3/0/2/130271145/2213732.pdf
    • http://juliefhermedinagalban.com/uploads/1/3/0/2/130287462/8240f6ee8.pdf
    • http://www.womersleyenvironmentalservices.com/uploads/1/3/0/4/130435826/sogesewet.pdf
    • http://heloisecrista.com/uploads/1/3/0/3/130323493/govofezagiv.pdf
    • http://mywaybrands.com/uploads/1/3/0/5/130590457/posalefe.pdf
    • http://projectlifestudios.com/uploads/1/3/0/6/130639635/d493ca9e7d0e2.pdf
    • http://webmail.trainingsolutionsinternational.com/uploads/1/3/0/7/130739975/tosiva.pdf
    • http://easyenergetics.net/uploads/1/3/0/6/130640097/mokulivawow.pdf
    • http://getitgatorauto.com/uploads/1/3/0/3/130379248/44c7b.pdf
    • http://mail.villagegreenla.net/uploads/1/3/0/4/130489090/damunopupud.pdf
    • http://nexuspos.net/uploads/1/3/0/4/130476830/fabawedaxawigipute.pdf
    • http://metersnelectronics.com/uploads/1/3/0/6/130604088/542765.pdf
    • http://maturefaps.com/uploads/1/3/0/6/130621324/kujagagux.pdf
    • http://bambringo.com/uploads/1/3/0/2/130289304/nasilogimamiwunaxemi.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_off000082b1.bin
aba2edc4b39274421a7d45ff5559b2cfc5c38b096c6b88613729b555054eed8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82B1 8424 bytes

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