Malicious PDF — malware analysis report

Static analysis result for SHA-256 e984d6870a1c305a…

MALICIOUS

PDF

45.0 KB Created: 2020-03-26 12:30:31 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f746564c469a024bb0f4eafd4912b9c4 SHA-1: aeb6d58c51e7987fb65c00e9377802650d8b6d91 SHA-256: e984d6870a1c305ace14a62a5840800c0238990b736d3752bbcf6b011a629726
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, to other PDF files hosted on various domains. The ML classifier also strongly indicated maliciousness. This suggests the document is designed to redirect users to potentially malicious content or for SEO manipulation 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://chichesterfootandankle.org/uploads/1/3/0/2/130273623/130273623.html#los+tiempos+verbales+indicativo+subjuntivo+e+imperativo
    • http://x-prestige.com/uploads/1/3/0/4/130483238/1e264ba0.pdf
    • http://www.meyersgina.studio/uploads/1/3/0/5/130589400/pekat-karuruzuwel-serabi.pdf
    • http://juarezconstructionllc.com/uploads/1/3/0/7/130776026/61980d.pdf
    • http://thoughtvitamin.com/uploads/1/3/0/4/130490399/5967849.pdf
    • http://elise-bennett.com/uploads/1/3/0/5/130551576/fuwofivuwajeme_bovinemekuwi_sarevedu.pdf
    • http://theheatlmm.com/uploads/1/3/0/3/130379332/7037135.pdf
    • http://guiasregionais.com/uploads/1/3/0/8/130874509/dofisemoderow_zuzasulikoka.pdf
    • http://jennifernau.nyc/uploads/1/3/0/4/130477468/9934576.pdf
    • http://laokqipaipingce.f18.ebkf.org/uploads/1/3/0/5/130590180/5926443.pdf
    • http://mtl-home.com/uploads/1/3/0/5/130588332/f54ded5e606.pdf
    • http://vetraluminio.com/uploads/1/3/0/6/130621682/dubuvu_tixagujixozami_tasexe_nedesazizake.pdf
    • http://puhfcbd.com/uploads/1/3/0/9/130969143/mevofa.pdf
    • http://affordableproductshots.com/uploads/1/3/0/3/130379804/vexeduxewip.pdf
    • http://samsungsmarthome.net/uploads/1/3/0/4/130435785/zadenaxikalawobejupu.pdf
    • http://www.eternalfreespirit.com/uploads/1/3/0/6/130620982/fasugufonukuwozila.pdf
    • http://automaticpocketdoor.com/uploads/1/3/0/5/130544413/73513432f8ae.pdf
    • http://lorenamartinezhomes.com/uploads/1/3/0/8/130814157/7417540.pdf
    • http://rheacafeandgrill.com/uploads/1/3/0/5/130551957/f7140d61a.pdf
    • http://ppc-rainmaker.com/uploads/1/3/0/5/130539841/655619.pdf
    • http://expressionswithgesture.com/uploads/1/3/0/7/130738629/6962629.pdf
    • http://easypeintures.com/uploads/1/3/0/4/130489696/ce795c5517f912d.pdf
    • http://jesianequeiroz.com/uploads/1/3/0/7/130738676/momarazupukigo.pdf
    • http://greatguacamole.com/uploads/1/3/0/7/130739158/tabuluxip.pdf
    • http://jesianequeiroz.com/uploads/1/3/0/7/130738676/momarazupukig
    • http://site54340.mywhc.ca/uploads/1/3/0/5/130538981/tovaxif-wifer.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_off00008443.bin
c61d9b19e3baec77b5695e654658523e7f64f68e497be9ed3143bf5cc067f047		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8443 8736 bytes

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